Khan/khan-exercises — Issue #9389: Creating box and whisker plots - Box-and-Whisker solutions aren't correct (or video help isn't correct))
Author: KhanBugz
Created: 2011-12-23 17:35:42+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

Reporter: 3dgars@gmail.com

this is solution to Box-and-Whisker's practice problem:

Begin by putting the data in order:

5,6,6,6,6,7,7,8,8,8,9,10,11,11,12

Plot the sample minimum (smallest number):

5,6,6,6,6,7,7,8,8,8,9,10,11,11,12

Plot the sample maximum (largest number):

5,6,6,6,6,7,7,8,8,8,9,10,11,11,12

Plot the median (middle number):

5,6,6,6,6,7,7,8,8,8,9,10,11,11,12

Plot the first quartile (halfway between the smallest number and the middle number). Since there isn't a single number halfway between the smallest number and the median, average the two numbers:

5,6,6,[6,6],7,7,8,8,8,9,10,11,11,12

Plot the third quartile (halfway between the middle number and the largest number). Since there isn't a single number halfway between the median and the largest number, average the two numbers:

5,6,6,6,6,7,7,8,8,8,9,[10,11],11,12

Your box-and-whisker plot should look like the example below the number line.

From video tutorial I understood, that two numbers between the median and the largest number should be [9,10]/2, but solution to problem is [10,11]/2

[creating_box_and_whisker_plots.html?seed=160&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/creating_box_and_whisker_plots.html?seed=160&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/creating_box_and_whisker_plots.html?seed=160&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B5%2C6%2C8%2C9.5%2C12%5D%22%2C92%5D%2C%5B%22correct-activity%22%2C%22%5B5%2C6%2C8%2C10.5%2C12%5D%22%2C3%5D%5D)

[[5,6,8,9.5,12],[5,6,8,10.5,12]]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

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