P1ayer-1/eli5-questions · Datasets at Hugging Face

title stringlengths 1 312	post_id stringlengths 5 7	over_18 bool 2 classes	subreddit stringclasses 1 value	link_flair_text stringlengths 2 63 ⌀	self_text stringlengths 1 32k ⌀
ELI5 - what each major math subject is teaching us.	81kiin	false	explainlikeimfive	Mathematics	[removed]
ELI5:How do you decide what statistical test to use if you are trying to find a correlation?	820p8n	false	explainlikeimfive	Mathematics	null
ELI5: How can every card deck shuffle be unique?	821mol	false	explainlikeimfive	Mathematics	I've read that every shuffled deck is almost certainly unique, has never been dealt before and will never be dealt again. And I realize that the number of ways a deck of cards can be shuffled is 52!, a number so large that even Charlie Sheen standing on Chuck Norris's shoulders cannot comprehend it. But in practice, if you take two identical decks of cards, cut them in the middle and shuffle them perfectly, they're gonna be the same, right? I get that it might be hard to shuffle perfectly, ie, one from the left, one from the right, one from the left, etc. But it's certainly not impossible, or even particularly implausible, I would think.
ELI5:How to calculate these odds?	825kda	false	explainlikeimfive	Mathematics	[removed]
Pasterski-Strominger-Zhiboedov Triangle	8262ht	false	explainlikeimfive	Mathematics	I have recently learned about Sabrina Pasterski and in doing research learned she’s responsible for discovering the “spin memory effect” and the “Pasterski-Strominger-Zhiboedov Triangle.” I tried to do a little digging to understand the importance, relevance, and applications of the triangle but it’s a few levels above my comprehension. So if someone could ELI5 that’d be really appreciated and fantastic. Thank you in advance!
ELI5:Why isn't integrating a function as procedural as finding its derivative?	82bjbs	false	explainlikeimfive	Mathematics	Calculus question: why does integrating a function often take more experimentation / trial and error than finding the function's derivative, which is almost entirely procedural? Especially since, by the fundamental theorem of calculus, both differentiation and integration of any given function are essentially inverses of one another?
ELI5: Roots of Complex Numbers (De Moivre's Theorem)	8331m2	false	explainlikeimfive	Mathematics	Can someone explain why, when graphing the roots of complex numbers in polar form, they will always be equally spaced apart? As in, what part of calculating the value of the root causes them to be separated by exactly 2π/n radians? Thank you
ELI5: In statistics, what is a Chi-square distribution	83fvc6	false	explainlikeimfive	Mathematics	null
ELI5: Why is log(55) around 1.7 but ln(55) around 4?	83g8dy	false	explainlikeimfive	Mathematics	Aren't log and ln supposed to be the same? Doesn't ln mean log with base 10? I'm confused.
ELI5:What is the limit of the series of (2^n)n>=0	83ghia	false	explainlikeimfive	Mathematics	[removed]
ELI5:Calc 1 - Sketching the graph given properties.	83hv4n	false	explainlikeimfive	Mathematics	[removed]
ELI5: The Math behind Cost/Margin/Sell etc.	849238	false	explainlikeimfive	Mathematics	explain to me the math behind how a cost of $100 has a sell of (roughly) $133 off 25% margin
ELI5: what is intransitivity, and how can you write it down mathematically	84nhr2	false	explainlikeimfive	Mathematics	I understand the basic example: "a > b > c; c > a", but I was wondering how you explain intransitivity in a mathematical way.
ELI5: How do some math problems become so massive they take up full massive chalk boards?	854zpl	false	explainlikeimfive	Mathematics	null
ELI5: Why is the formula for standard deviation different for a sample and a population?	855zta	false	explainlikeimfive	Mathematics	I've taken a look at an earlier eli5 but am still very confused.
ELI5: How can more numbers come after a recurring decimal?	857jno	false	explainlikeimfive	Mathematics	So on my calculator ages ago I noticed that the number was (for example: 4.67(recurring)52947... How can a decimal that is recurring (which was explained to me as carrying on infinitely) have more numbers coming after it, if it is infinite? This may be a stupid question but it's been confusing me for a while an my teacher could never explain.
ELI5: Why is the number 7 so odd?	859szs	false	explainlikeimfive	Mathematics	[removed]
Why is math a universal language and how can we be so sure about it	85aei2	false	explainlikeimfive	Mathematics	[removed]
ELI5: What exactly is a Tesseract?	85c2jn	false	explainlikeimfive	Mathematics	null
ELI5: Are there 'half' dimensions?	85i2zs	false	explainlikeimfive	Mathematics	There's some really cool posts about the 4th dimension and Tesseracts, and it's got me thinking: Is it mathematically possible to have half dimensions, or dimensions of imperfect decimal value? Like, in between the 3rd and the 4th, is there a 3.5th?
ELI5:Bayers' Theorem	85ll60	false	explainlikeimfive	Mathematics	[removed]
ELI5: How to add/subtract time?	85ytgu	false	explainlikeimfive	Mathematics	[removed]
ELIF Why we need to differentiate derivatives ? Whats the reason ?	8649z0	false	explainlikeimfive	Mathematics	null
ELI5:ROC Curves in Statistics / Data Science	866mmt	false	explainlikeimfive	Mathematics	I work for a data science company, but not in data science. I support our customers. We dig into ROC curves and other things when explaining what we do with data, but it goes way over my head. Could someone explain what a ROC curve is, how it's derived, what it measures, and how it measures whatever it is it measures?
ELI5: How does the formula for getting the day of the week from the date work?	86eg2h	false	explainlikeimfive	Mathematics	[removed]
ELI5: What is an elementary function?	873t09	false	explainlikeimfive	Mathematics	What makes a function an elementary function, and what are the names of functions that aren't elementary?
ELI5: Why picking only 10 people for a data study is worse than picking >30 people.	87kolx	false	explainlikeimfive	Mathematics	I have been trying to answer this question for a friend who REALLY doesn't seem to understand outliers and how they affect data. He doesn't have a math background, and really doesn't understand the concepts behind a good sample size. We are trying to come up with a means to collect data on athletes and their performance in certain areas, and my friend only wants to take data from the best 10 and I am saying we need a larger sample size to have relevant data. If someone could REALLY simplify this down, in a easy and visual way to explain this, I would be very very appreciative.
ELI5: pairwise comparison in a reccomendation system?	87x0no	false	explainlikeimfive	Mathematics	How does pairwise comparison work respective of a matrix or/and mathematically within a recommendation system, e.g. for a grocery website, film recommendation site etc...? The trouble I am having is breaking down pairwise comparison method down enough to understand it respective of a recommendation system.
ELI5: How does grading on a bell curve work?	achoud	false	explainlikeimfive	Mathematics	null
ELI5: How does using a Logarithmic scale work for representing something physical?	acik1m	false	explainlikeimfive	Mathematics	null
ELI5: How does light affect affect the passing of time?	acoqkm	false	explainlikeimfive	Mathematics	[deleted]
ELI5: How do automobile manufacturers estimate fuel economy for new cars? And how reliable are these estimates for normal driving conditions?	ad0554	false	explainlikeimfive	Mathematics	null
ELI5: The Wheel Theory	ad3awu	false	explainlikeimfive	Mathematics	And applications if possible.
ELI5: Why is it the amount of storage on a hard drive is less than what is displayed on the packaging	adhdrn	false	explainlikeimfive	Mathematics	null
ELI5: Why is there an entire discipline of mathematics devoted to triangles and not other shapes like circles trapezoids or hexagons?	aem2k6	false	explainlikeimfive	Mathematics	null
ELI5: The Missing Dollar Problem	aevik6	false	explainlikeimfive	Mathematics	null
ELI5: How have imaginary concepts likenumbers and mathematics taken us tothe Moon and back, and allowed usscientific breakthroughs?	af7kwd	false	explainlikeimfive	Mathematics	[removed]
ELI5: What is regressive analysis?	agccde	false	explainlikeimfive	Mathematics	[deleted]
ELI5: What exactly does the term Standard Deviation mean. I know it is a synonym for outlier but it it more? Thanks!	agk3a2	false	explainlikeimfive	Mathematics	null
ELI5: What is a vectorspace?	agp9o9	false	explainlikeimfive	Mathematics	null
How does GPA work?	agstvy	false	explainlikeimfive	Mathematics	[removed]
How are imaginary numbers a thing	ahofrk	false	explainlikeimfive	Mathematics	[removed]
Eli5: The potato paradox.	aif4wi	false	explainlikeimfive	Mathematics	Please do your best. Thanks.
ELI5: Partial least-squares regression (PLS) with just one single target variable	ail53u	false	explainlikeimfive	Mathematics	How does PLS regression work, when you have just one target variable that you want to predict (PLS1)? All the examples I found were explained with more than one target variable (PLS2). But I can't calculate PCA on just one variable right?
Hard.	aizm4s	false	explainlikeimfive	Mathematics	[removed]
ELI5: Why are there conservative polls and liberal polls? Isn't the point to get accurate data?	aj6tkb	false	explainlikeimfive	Mathematics	[removed]
ELI5: How does machine understands machine language?	aj9ta3	false	explainlikeimfive	Mathematics	Maybe this is stupid, but I want to know how does a bunch of silicon wafers, some metal, a little plastic understands combinations of zeros and one's to produce A, B, C ,,...
ELI5: Why does 1^∞ equal e, rather than 1?	ajd6tw	false	explainlikeimfive	Mathematics	[removed]
ELI5: How did early explorers map out the shape of countries so accurately? One specific example would be Matthew Flinders with Australia.	ajuck7	false	explainlikeimfive	Mathematics	[removed]
ELI5: If I have a 9% chance to "roll" something, what is the maximum amount of tries that I need to take to guarantee that I "roll" it?	ak884r	false	explainlikeimfive	Mathematics	[deleted]
ELI5: How can the rubiks cube be solved with simple algorythms, from any starting point?	ak9627	false	explainlikeimfive	Mathematics	null
ELI5: How can you explain the concept of Laplace and Fourier Transform using analogies to a kid?	akbg76	false	explainlikeimfive	Mathematics	[removed]
ELI5: What is the difference between stacked and unstacked data?	akshal	false	explainlikeimfive	Mathematics	This may not be the place, but nobody has explained it in a way that makes sense to me yet. When it comes to data conveyed through charts and stuff, I really just can't comprehend the difference between stacked and unstacked. It seems like it's supposed to be simple, but it isn't for me.
ELI5: Two column proofing	alf31w	false	explainlikeimfive	Mathematics	[removed]
ELI5: How does the antiderivative ice area under the curve?	alvia4	false	explainlikeimfive	Mathematics	I know that the notation for an integral means the sum of all the heights of the function multiplied by a little change in x to get the area under the curve, and I understand that that’s how calculators calculate integrals as well: by basically doing Riemann Sums with 1000 rectangles or something. But what I don’t get is how the antiderivative gives the function of the area of the curve. Derivatives have to do with slopes of the graphs, but how is the opposite of that area?
ELI5: Is 1.999... an odd number or an even number?	93jxel	false	explainlikeimfive	Mathematics	[removed]
ELI5: Hexadecimal alphanumeric system. (how) Does it work?	93o534	false	explainlikeimfive	Mathematics	[removed]
ELI5: How do chance and probability correlate / work exactly?	94x1p3	false	explainlikeimfive	Mathematics	My friend and I were recently talking about this and I am in need of an explanation. If you have an event that has a fixed 1% chance of giving you something/an item and you run it repeatedly the chance isn‘t affected but the probability increases right? If you were to run this 1% chance a thousand times, how likely would this event be? Is there a possibility that you will never get it?
ELI5: Euler's number and logarithms	96s8c7	false	explainlikeimfive	Mathematics	[deleted]
ELI5 why did my penis stop growing after I turned -437?	970ynj	false	explainlikeimfive	Mathematics	[removed]
ELI5: did we invent math or discover it?	986gds	false	explainlikeimfive	Mathematics	[removed]
ELI5: Why does the answer in a series of operations change when you don't follow the PEMDAS rule?	98jvz0	false	explainlikeimfive	Mathematics	[removed]
ELI5: the Oppenheim conjecture (Mathematics, Diophantine approximation)	98o2d2	false	explainlikeimfive	Mathematics	null
ELI5: Why does root mean squared not equal 0?	99b9lw	false	explainlikeimfive	Mathematics	I've noticed it's a mathematical concept that keeps coming up into physics dealing with averages that would normally result in 0 like in kinetic gases and ac theory, what about this mathematical trick allow for effective /true values on 0 averages?
ELI5: https://brilliant.org/problems/chalinging-limit/?ref_id=1524167	99k24t	false	explainlikeimfive	Mathematics	[removed]
ELI5: What is Catastrophe Theory, and what does it tell us?	99vgyh	false	explainlikeimfive	Mathematics	null
ELI5: What is the adjoint representation?	9al8ls	false	explainlikeimfive	Mathematics	null
ELI5 why on my children’s bottles there is a clear difference between UK -FL OZ and US- FL OZ. Example in comments	9b1dun	false	explainlikeimfive	Mathematics	null
ELI5: Why doesn't 0÷0 = 0?	9kbei9	false	explainlikeimfive	Mathematics	[removed]
ELI5: Hello reddit, can someone please explain to me how mathematicians/Physicists can come up with page long equations such as the "Standard Model Equation"? Where do they begin and how do they know the equation is true?	9kc7nl	false	explainlikeimfive	Mathematics	[removed]
ELI5: How do mathematicians and physicists come up with page long equations such as the "Standard Model Equation"? Where do they start and how do they test these equations for accuracy?	9kc8e3	false	explainlikeimfive	Mathematics	null
ELI5: What’s special about taking the ln of something that you can reliably transform a curved graph into a more linear one?	9khbbn	false	explainlikeimfive	Mathematics	null
ELI5: What is the abc conjecture and why is there so much attention around it right now?	9kpksx	false	explainlikeimfive	Mathematics	null
ELI5: If an open circle indicates on a graph that a certain point begins right after those x and y values, how would you indicate when a point begins after only one of the two?	9kqcd9	false	explainlikeimfive	Mathematics	[removed]
ELI5: How do I know if my odds of winning a bet are worth betting?	9kr99g	false	explainlikeimfive	Mathematics	[removed]
ELI5: Ackermann's Function	9l0pmf	false	explainlikeimfive	Mathematics	How does Ackermann's function work?
ELI5: Why do some notes sound well together and some don't	9lp3pz	false	explainlikeimfive	Mathematics	[deleted]
ELI5: In mathematics, what are domains?	9lww5z	false	explainlikeimfive	Mathematics	[deleted]
ELI5: Why can't businesses just tell us the price of their product with tax already instead of at the register?	9mi0mt	false	explainlikeimfive	Mathematics	[removed]
ELI5: How long is a Second?	9neek8	false	explainlikeimfive	Mathematics	[removed]
ELI5 How to solve derivatives?	9nld60	false	explainlikeimfive	Mathematics	[removed]
ELI5: Do more contenders create a higher level of competition?	9nni4u	false	explainlikeimfive	Mathematics	Let's say you have a chart of 100 people, all racing to have the most points. They gain these points by completing individual challenges, and they never face a 1-on-1 scenario with each other. The top 25 have 1,000 points, whereas the bottom 75 have no more than 500 points. Both groups are hypothetically increasing their points at an even rate (or the top 25 increase faster because they're better/trying harder/etc). Does the existence of 100 contenders innately mean that there is more competition for the top 25, even though the top 25 is so far above the bottom 75 that they'll never be a real threat? Doesn't this mean the top 25 find competition only from the other people in the top 25? A friend and I were discussing this because of a video game ranking system, and she argued that more contenders = higher competition, regardless of how good any of them are, but I disagreed because most contenders aren't high enough to threaten the top contenders. She argued that this is why bell curves exist, but that's where the conversation ended because, admittedly, I have no idea how bell curves work. I can be more specific about the game and ranking system, but I was trying to keep it basic so as to try to avoid complicating things with info that may mean nothing to any particular reader. ELI5? Thanks! edit: I flaired this as mathematics, but I'm not sure its the correct flair. I'd be happy to change it if necessary.
E=mc^2. Can this even be eli5?	9npsap	false	explainlikeimfive	Mathematics	[removed]
ELI5: Generalizability Theory/ Generalizability Coefficient	9o5s0l	false	explainlikeimfive	Mathematics	The terms came up on my homework, I can't find a definition of either of them online that doesn't make my eyes bleed. Help!
ELI5: If you get 900 for an answer and need two sig figs, how do you signify the first 0 is significant and the second isnt?	9o7zo5	false	explainlikeimfive	Mathematics	null
ELI5: How do you find the equation of a curve after plotting it?	9o9azn	false	explainlikeimfive	Mathematics	[removed]
ELI5: a definition of what an algorithm is and an outline of the process in building an application?	9on94q	false	explainlikeimfive	Mathematics	null
ELI5: Independent component analysis vs. Fourier Analysis	9p300h	false	explainlikeimfive	Mathematics	From what I've read about ICA, it allows you to isolate/extract a particular signal (PS) from a given signal (GS). GS is some linear combination of "base signals" (BS). This all sounds kind of like fourier analysis. In fourier analysis, you can figure out which frequencies are present in a given signal. So what is the difference between the two and when would you use one vs. the other? Thanks! :-) Background: familiar with fourier analysis, but not as much with statistics. I have taken basic statistics for engineering (statistical distributions, error analysis, ANOVA) but nothing more than that.
ELI5: What is nominal, ordinal, continuous and discrete data, and how can I identify which is which?	9p7ipo	false	explainlikeimfive	Mathematics	To clarify, this is about statistical maths. I'd also like to know how these different types of data relate to qualitative (or categorical) and quantitative data.
ELI5: Machine Learning vs. Regression	9pcj1k	false	explainlikeimfive	Mathematics	[removed]
ELI5: Why is the intergral of 1/x equal to ln(\|x\|)?	9po47e	false	explainlikeimfive	Mathematics	[removed]
ELI5: What is an anti-pattern?	9pty6h	false	explainlikeimfive	Mathematics	null
ELI5: why the monty hall problem is not a 50/50 probability once there are only 2 choices remaining	9pvku4	false	explainlikeimfive	Mathematics	[removed]
ELI5: What exactly is the significance of pi (the number)	9q44gf	false	explainlikeimfive	Mathematics	I use pi all the time to find out the diameter and circumference of a circle and what not, but I have no idea what it actually is because my teachers never really told me what it means or why it’s important. Can you guys help me out?
ELI5: What exactly is happening when you divide by zero? Why can't it be done?	9qomtg	false	explainlikeimfive	Mathematics	null
ELI5: Why is the mega million lowest prize odds at 1/37 when the mega ball is only ranging from 1-25?	9qsbdz	false	explainlikeimfive	Mathematics	[removed]
ELI5: How statistically unlikely is it that 1 person won a $1.6bil lottery jackpot	9qyu6b	false	explainlikeimfive	Mathematics	null
How do you solve/graph complex exponents (x^i) and what are they used for?	9rczsw	false	explainlikeimfive	Mathematics	[removed]
ELI5: Why is y=sqrt(x) not a sideways parabola?	9rnx70	false	explainlikeimfive	Mathematics	[removed]
ELI5: how does the hash encryption work?	9rw4ka	false	explainlikeimfive	Mathematics	I want to how hashing algorithms works, I mean in salt hashing the same plaintext generates multiple hashes so when the app stores one hash when user register and then he logged in now there are 2 different hashes in the register and log in how the app compares theses 2 hashes? and validating this user?

ELI5 - what each major math subject is teaching us.

81kiin

false

explainlikeimfive

Mathematics

[removed]

ELI5:How do you decide what statistical test to use if you are trying to find a correlation?

820p8n

false

explainlikeimfive

Mathematics

null

ELI5: How can every card deck shuffle be unique?

821mol

false

explainlikeimfive

Mathematics

I've read that every shuffled deck is almost certainly unique, has never been dealt before and will never be dealt again. And I realize that the number of ways a deck of cards can be shuffled is 52!, a number so large that even Charlie Sheen standing on Chuck Norris's shoulders cannot comprehend it. But in practice, if you take two identical decks of cards, cut them in the middle and shuffle them perfectly, they're gonna be the same, right? I get that it might be hard to shuffle perfectly, ie, one from the left, one from the right, one from the left, etc. But it's certainly not impossible, or even particularly implausible, I would think.

ELI5:How to calculate these odds?

825kda

false

explainlikeimfive

Mathematics

[removed]

Pasterski-Strominger-Zhiboedov Triangle

8262ht

false

explainlikeimfive

Mathematics

I have recently learned about Sabrina Pasterski and in doing research learned she’s responsible for discovering the “spin memory effect” and the “Pasterski-Strominger-Zhiboedov Triangle.” I tried to do a little digging to understand the importance, relevance, and applications of the triangle but it’s a few levels above my comprehension. So if someone could ELI5 that’d be really appreciated and fantastic. Thank you in advance!

ELI5:Why isn't integrating a function as procedural as finding its derivative?

82bjbs

false

explainlikeimfive

Mathematics

Calculus question: why does integrating a function often take more experimentation / trial and error than finding the function's derivative, which is almost entirely procedural? Especially since, by the fundamental theorem of calculus, both differentiation and integration of any given function are essentially inverses of one another?

ELI5: Roots of Complex Numbers (De Moivre's Theorem)

8331m2

false

explainlikeimfive

Mathematics

Can someone explain why, when graphing the roots of complex numbers in polar form, they will always be equally spaced apart? As in, what part of calculating the value of the root causes them to be separated by exactly 2π/n radians? Thank you

ELI5: In statistics, what is a Chi-square distribution

83fvc6

false

explainlikeimfive

Mathematics

null

ELI5: Why is log(55) around 1.7 but ln(55) around 4?

83g8dy

false

explainlikeimfive

Mathematics

Aren't log and ln supposed to be the same? Doesn't ln mean log with base 10? I'm confused.

ELI5:What is the limit of the series of (2^n)n>=0

83ghia

false

explainlikeimfive

Mathematics

[removed]

ELI5:Calc 1 - Sketching the graph given properties.

83hv4n

false

explainlikeimfive

Mathematics

[removed]

ELI5: The Math behind Cost/Margin/Sell etc.

849238

false

explainlikeimfive

Mathematics

explain to me the math behind how a cost of $100 has a sell of (roughly) $133 off 25% margin

ELI5: what is intransitivity, and how can you write it down mathematically

84nhr2

false

explainlikeimfive

Mathematics

I understand the basic example: "a > b > c; c > a", but I was wondering how you explain intransitivity in a mathematical way.

ELI5: How do some math problems become so massive they take up full massive chalk boards?

854zpl

false

explainlikeimfive

Mathematics

null

ELI5: Why is the formula for standard deviation different for a sample and a population?

855zta

false

explainlikeimfive

Mathematics

I've taken a look at an earlier eli5 but am still very confused.

ELI5: How can more numbers come after a recurring decimal?

857jno

false

explainlikeimfive

Mathematics

So on my calculator ages ago I noticed that the number was (for example: 4.67(recurring)52947... How can a decimal that is recurring (which was explained to me as carrying on infinitely) have more numbers coming after it, if it is infinite? This may be a stupid question but it's been confusing me for a while an my teacher could never explain.

ELI5: Why is the number 7 so odd?

859szs

false

explainlikeimfive

Mathematics

[removed]

Why is math a universal language and how can we be so sure about it

85aei2

false

explainlikeimfive

Mathematics

[removed]

ELI5: What exactly is a Tesseract?

85c2jn

false

explainlikeimfive

Mathematics

null

ELI5: Are there 'half' dimensions?

85i2zs

false

explainlikeimfive

Mathematics

There's some really cool posts about the 4th dimension and Tesseracts, and it's got me thinking: Is it mathematically possible to have half dimensions, or dimensions of imperfect decimal value? Like, in between the 3rd and the 4th, is there a 3.5th?

ELI5:Bayers' Theorem

85ll60

false

explainlikeimfive

Mathematics

[removed]

ELI5: How to add/subtract time?

85ytgu

false

explainlikeimfive

Mathematics

[removed]

ELIF Why we need to differentiate derivatives ? Whats the reason ?

8649z0

false

explainlikeimfive

Mathematics

null

ELI5:ROC Curves in Statistics / Data Science

866mmt

false

explainlikeimfive

Mathematics

I work for a data science company, but not in data science. I support our customers. We dig into ROC curves and other things when explaining what we do with data, but it goes way over my head. Could someone explain what a ROC curve is, how it's derived, what it measures, and how it measures whatever it is it measures?

ELI5: How does the formula for getting the day of the week from the date work?

86eg2h

false

explainlikeimfive

Mathematics

[removed]

ELI5: What is an elementary function?

873t09

false

explainlikeimfive

Mathematics

What makes a function an elementary function, and what are the names of functions that aren't elementary?

ELI5: Why picking only 10 people for a data study is worse than picking >30 people.

87kolx

false

explainlikeimfive

Mathematics

I have been trying to answer this question for a friend who REALLY doesn't seem to understand outliers and how they affect data. He doesn't have a math background, and really doesn't understand the concepts behind a good sample size. We are trying to come up with a means to collect data on athletes and their performance in certain areas, and my friend only wants to take data from the best 10 and I am saying we need a larger sample size to have relevant data. If someone could REALLY simplify this down, in a easy and visual way to explain this, I would be very very appreciative.

ELI5: pairwise comparison in a reccomendation system?

87x0no

false

explainlikeimfive

Mathematics

How does pairwise comparison work respective of a matrix or/and mathematically within a recommendation system, e.g. for a grocery website, film recommendation site etc...? The trouble I am having is breaking down pairwise comparison method down enough to understand it respective of a recommendation system.

ELI5: How does grading on a bell curve work?

achoud

false

explainlikeimfive

Mathematics

null

ELI5: How does using a Logarithmic scale work for representing something physical?

acik1m

false

explainlikeimfive

Mathematics

null

ELI5: How does light affect affect the passing of time?

acoqkm

false

explainlikeimfive

Mathematics

[deleted]

ELI5: How do automobile manufacturers estimate fuel economy for new cars? And how reliable are these estimates for normal driving conditions?

ad0554

false

explainlikeimfive

Mathematics

null

ELI5: The Wheel Theory

ad3awu

false

explainlikeimfive

Mathematics

And applications if possible.

ELI5: Why is it the amount of storage on a hard drive is less than what is displayed on the packaging

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Mathematics

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ELI5: Why is there an entire discipline of mathematics devoted to triangles and not other shapes like circles trapezoids or hexagons?

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Mathematics

null

ELI5: The Missing Dollar Problem

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Mathematics

null

ELI5: How have imaginary concepts likenumbers and mathematics taken us tothe Moon and back, and allowed usscientific breakthroughs?

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Mathematics

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ELI5: What is regressive analysis?

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Mathematics

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ELI5: What exactly does the term Standard Deviation mean. I know it is a synonym for outlier but it it more? Thanks!

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Mathematics

null

ELI5: What is a vectorspace?

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Mathematics

null

How does GPA work?

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Mathematics

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How are imaginary numbers a thing

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Mathematics

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Eli5: The potato paradox.

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Mathematics

Please do your best. Thanks.

ELI5: Partial least-squares regression (PLS) with just one single target variable

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Mathematics

How does PLS regression work, when you have just one target variable that you want to predict (PLS1)? All the examples I found were explained with more than one target variable (PLS2). But I can't calculate PCA on just one variable right?

Hard.

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Mathematics

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ELI5: Why are there conservative polls and liberal polls? Isn't the point to get accurate data?

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Mathematics

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ELI5: How does machine understands machine language?

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Mathematics

Maybe this is stupid, but I want to know how does a bunch of silicon wafers, some metal, a little plastic understands combinations of zeros and one's to produce A, B, C ,,...

ELI5: Why does 1^∞ equal e, rather than 1?

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Mathematics

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ELI5: How did early explorers map out the shape of countries so accurately? One specific example would be Matthew Flinders with Australia.

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Mathematics

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ELI5: If I have a 9% chance to "roll" something, what is the maximum amount of tries that I need to take to guarantee that I "roll" it?

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Mathematics

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ELI5: How can the rubiks cube be solved with simple algorythms, from any starting point?

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Mathematics

null

ELI5: How can you explain the concept of Laplace and Fourier Transform using analogies to a kid?

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Mathematics

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ELI5: What is the difference between stacked and unstacked data?

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Mathematics

This may not be the place, but nobody has explained it in a way that makes sense to me yet. When it comes to data conveyed through charts and stuff, I really just can't comprehend the difference between stacked and unstacked. It seems like it's supposed to be simple, but it isn't for me.

ELI5: Two column proofing

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Mathematics

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ELI5: How does the antiderivative ice area under the curve?

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explainlikeimfive

Mathematics

I know that the notation for an integral means the sum of all the heights of the function multiplied by a little change in x to get the area under the curve, and I understand that that’s how calculators calculate integrals as well: by basically doing Riemann Sums with 1000 rectangles or something. But what I don’t get is how the antiderivative gives the function of the area of the curve. Derivatives have to do with slopes of the graphs, but how is the opposite of that area?

ELI5: Is 1.999... an odd number or an even number?

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Mathematics

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ELI5: Hexadecimal alphanumeric system. (how) Does it work?

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Mathematics

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ELI5: How do chance and probability correlate / work exactly?

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Mathematics

My friend and I were recently talking about this and I am in need of an explanation. If you have an event that has a fixed 1% chance of giving you something/an item and you run it repeatedly the chance isn‘t affected but the probability increases right? If you were to run this 1% chance a thousand times, how likely would this event be? Is there a possibility that you will never get it?

ELI5: Euler's number and logarithms

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Mathematics

[deleted]

ELI5 why did my penis stop growing after I turned -437?

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Mathematics

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ELI5: did we invent math or discover it?

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Mathematics

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ELI5: Why does the answer in a series of operations change when you don't follow the PEMDAS rule?

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Mathematics

[removed]

ELI5: the Oppenheim conjecture (Mathematics, Diophantine approximation)

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Mathematics

null

ELI5: Why does root mean squared not equal 0?

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Mathematics

I've noticed it's a mathematical concept that keeps coming up into physics dealing with averages that would normally result in 0 like in kinetic gases and ac theory, what about this mathematical trick allow for effective /true values on 0 averages?

ELI5: https://brilliant.org/problems/chalinging-limit/?ref_id=1524167

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Mathematics

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ELI5: What is Catastrophe Theory, and what does it tell us?

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Mathematics

null

ELI5: What is the adjoint representation?

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Mathematics

null

ELI5 why on my children’s bottles there is a clear difference between UK -FL OZ and US- FL OZ. Example in comments

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Mathematics

null

ELI5: Why doesn't 0÷0 = 0?

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Mathematics

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ELI5: Hello reddit, can someone please explain to me how mathematicians/Physicists can come up with page long equations such as the "Standard Model Equation"? Where do they begin and how do they know the equation is true?

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Mathematics

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ELI5: How do mathematicians and physicists come up with page long equations such as the "Standard Model Equation"? Where do they start and how do they test these equations for accuracy?

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Mathematics

null

ELI5: What’s special about taking the ln of something that you can reliably transform a curved graph into a more linear one?

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Mathematics

null

ELI5: What is the abc conjecture and why is there so much attention around it right now?

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Mathematics

null

ELI5: If an open circle indicates on a graph that a certain point begins right after those x and y values, how would you indicate when a point begins after only one of the two?

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Mathematics

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ELI5: How do I know if my odds of winning a bet are worth betting?

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Mathematics

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ELI5: Ackermann's Function

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Mathematics

How does Ackermann's function work?

ELI5: Why do some notes sound well together and some don't

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Mathematics

[deleted]

ELI5: In mathematics, what are domains?

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Mathematics

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ELI5: Why can't businesses just tell us the price of their product with tax already instead of at the register?

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Mathematics

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ELI5: How long is a Second?

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Mathematics

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ELI5 How to solve derivatives?

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Mathematics

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ELI5: Do more contenders create a higher level of competition?

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explainlikeimfive

Mathematics

Let's say you have a chart of 100 people, all racing to have the most points. They gain these points by completing individual challenges, and they never face a 1-on-1 scenario with each other. The top 25 have 1,000 points, whereas the bottom 75 have no more than 500 points. Both groups are hypothetically increasing their points at an even rate (or the top 25 increase faster because they're better/trying harder/etc). Does the existence of 100 contenders innately mean that there is more competition for the top 25, even though the top 25 is so far above the bottom 75 that they'll never be a real threat? Doesn't this mean the top 25 find competition only from the other people in the top 25? A friend and I were discussing this because of a video game ranking system, and she argued that more contenders = higher competition, regardless of how good any of them are, but I disagreed because most contenders aren't high enough to threaten the top contenders. She argued that this is why bell curves exist, but that's where the conversation ended because, admittedly, I have no idea how bell curves work. I can be more specific about the game and ranking system, but I was trying to keep it basic so as to try to avoid complicating things with info that may mean nothing to any particular reader. ELI5? Thanks! edit: I flaired this as mathematics, but I'm not sure its the correct flair. I'd be happy to change it if necessary.

E=mc^2. Can this even be eli5?

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Mathematics

[removed]

ELI5: Generalizability Theory/ Generalizability Coefficient

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explainlikeimfive

Mathematics

The terms came up on my homework, I can't find a definition of either of them online that doesn't make my eyes bleed. Help!

ELI5: If you get 900 for an answer and need two sig figs, how do you signify the first 0 is significant and the second isnt?

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Mathematics

null

ELI5: How do you find the equation of a curve after plotting it?

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Mathematics

[removed]

ELI5: a definition of what an algorithm is and an outline of the process in building an application?

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Mathematics

null

ELI5: Independent component analysis vs. Fourier Analysis

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explainlikeimfive

Mathematics

From what I've read about ICA, it allows you to isolate/extract a particular signal (PS) from a given signal (GS). GS is some linear combination of "base signals" (BS). This all sounds kind of like fourier analysis. In fourier analysis, you can figure out which frequencies are present in a given signal. So what is the difference between the two and when would you use one vs. the other? Thanks! :-) Background: familiar with fourier analysis, but not as much with statistics. I have taken basic statistics for engineering (statistical distributions, error analysis, ANOVA) but nothing more than that.

ELI5: What is nominal, ordinal, continuous and discrete data, and how can I identify which is which?

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false

explainlikeimfive

Mathematics

To clarify, this is about statistical maths. I'd also like to know how these different types of data relate to qualitative (or categorical) and quantitative data.

ELI5: Machine Learning vs. Regression

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Mathematics

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ELI5: Why is the intergral of 1/x equal to ln(|x|)?

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Mathematics

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ELI5: What is an anti-pattern?

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Mathematics

null

ELI5: why the monty hall problem is not a 50/50 probability once there are only 2 choices remaining

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Mathematics

[removed]

ELI5: What exactly is the significance of pi (the number)

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explainlikeimfive

Mathematics

I use pi all the time to find out the diameter and circumference of a circle and what not, but I have no idea what it actually is because my teachers never really told me what it means or why it’s important. Can you guys help me out?

ELI5: What exactly is happening when you divide by zero? Why can't it be done?

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Mathematics

null

ELI5: Why is the mega million lowest prize odds at 1/37 when the mega ball is only ranging from 1-25?

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Mathematics

[removed]

ELI5: How statistically unlikely is it that 1 person won a $1.6bil lottery jackpot

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Mathematics

null

How do you solve/graph complex exponents (x^i) and what are they used for?

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Mathematics

[removed]

ELI5: Why is y=sqrt(x) not a sideways parabola?

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Mathematics

[removed]

ELI5: how does the hash encryption work?

9rw4ka

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explainlikeimfive

Mathematics

I want to how hashing algorithms works, I mean in salt hashing the same plaintext generates multiple hashes so when the app stores one hash when user register and then he logged in now there are 2 different hashes in the register and log in how the app compares theses 2 hashes? and validating this user?