Next steps in statistics

These resources are designed to help understand some key concepts in statistics.

  Video Written Resource Exercises

 An introduction to Statistics for Medics 


Variance and standard deviation

Introduction to formulae Video Webpage  
Sample variance Sample variance video    
Why we divide by (n-1) Why we divide by (n-1)    

Confidence intervals

Calculating confidence intervals for the mean


Stat Book webpage  

Relative risk and odds ratios

Relative risk Osmosis Video Boston University webpage  
Odds ratios

Odds ratio explained

Psych Scene Hub webpage  
Comparing relative risk and odds ratios Video

Guide to odds ratios

Medical statistics definitions, including definitions of relative risks and odds ratios


Introduction to correlation

Introduction to correlation

Correlation - the basic idea

Pearson's correlation coefficient

JMP webpage

Different measures of correlation   Measures of correlation  

Simple linear regression

Introduction Stat Trek video   Exercises
Making predictions Video Making predictions  

Hypothesis testing principles

Principles of hypothesis testing

Hypotheses and Hypothesis tests

P-Values simply explained


Type I and II errors: power, sample Size, effect size, etc

Power analysis

StatQuest video


Power-based calculations 
Sample size calculations  

Basic principles

Power Based Sample Size Calculations

An Introductin to Sample Size Calculations

Type I and Type II errors Introduction Slideshare presentation  
Cohen d (effect size) Calculating Cohen d    

Introductory Hypothesis tests 

Paired vs unpaired data Paired and independent samples    
One-Sample T-test      
T-tests (paired)

T-test in paired samples

JMP webpage 

Paired t-tests booklet (PDF, XKB)

T-tests (unpaired)

T-test in unpaired samples

Laerd Statistics webpage


Chi-squared test Video

Stat Book exercise

Chi-square test

Fisher's exact test Video Fisher’s Exact test (Word, XKB)  

Two people sitting at a table looking at some work together
Two people sitting at a table looking at some work together

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