Statistics Fundamentals | Dr Kristin Sainani
Channel: Stuart McErlain-Naylor
Date: 2020-07-02

Lecture 20 of the Sports Biomechanics Lecture Series #SportsBiomLS 
Kristin Sainani presents a 'nuts and bolts' lecture, explaining fundamental concepts in statistics. This includes standard error, confidence intervals, p-values, hypothesis testing, and minimal effects testing. The examples are from sports science but are relevant for many disciplines.

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00:00 Sports Biomechanics Lecture Series
01:28 Statistics Nuts and Bolts
03:29 What is Statistical Inference?
05:13 What is Standard Error?
09:21 Simulating Study Results
16:46 Effect of Sample Size on Statistical Results
18:26 Effect of Variability (Standard Deviation) on Statistical Results
20:02 What Factors Affect Standard Error?
25:46 What is a Confidence Interval?
36:39 P-Values and Hypothesis Testing
37:18 What is a P-Value?
42:17 What is a Hypothesis Test?
44:11 What is an Alpha (Significance Level)?
50:28 Minimal Effects One Sided Testing
54:02 Misinterpretations of P-Values
57:21 The Value of P-Values
59:55 Limitations of P-Values
01:01:25 Debates Over Significance Testing and P-Values
01:04:24 Q&A (Small Sample Sizes, n = 1, Multiple Comparisons, MBI, and More)

Other resources: 
10 common stats mistakes in 5 minutes video: https://www.youtube.com/watch?v=hlVl1dJE4GE 
How many participants do I need? https://www.youtube.com/watch?v=veaEDIM13Ks 
Sports Biomechanics editorial: Recommendations for statistical analysis involving null hypothesis significance testing: https://doi.org/10.1080/14763141.2020.1782555 
Free online statistics resources: https://www.stuartmcnaylor.com/statistics/ 

Kristin's second lecture on 'Tips for Scientific Writing': https://www.youtube.com/watch?v=PjhmDH3u98w 

Kristin's stats column in PM&R: https://onlinelibrary.wiley.com/doi/toc/10.1016/(ISSN)1934-1563.statistics 
Stats training Kristin offers through Stanford professional development: https://online.stanford.edu/programs/stanford-medical-statistics-certificate 

Web: https://www.stuartmcnaylor.com/sportsbiomls/ 
Audio: https://www.stuartmcnaylor.com/podbean/ 
Twitter: https://twitter.com/biomechstu 
Monthly research newsletter: https://www.stuartmcnaylor.com/newsletter/