Next steps in statistics

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

On

	Written Resource	Exercises
Variance and standard deviation
Introduction to formulae
Sample variance
Why we divide by (n-1)
Confidence intervals
Calculating confidence intervals for the mean
Relative risk and odds ratios
Relative risk
Odds ratios
Comparing relative risk and odds ratios	Medical statistics definitions, including definitions of relative risks and odds ratios
Introduction to correlation
Introduction to correlation
Different measures of correlation	Measures of correlation
Simple linear regression
Introduction
Making predictions	Making predictions
Hypothesis testing principles
Principles of hypothesis testing	Booklet
Type I and II errors: power, sample Size, effect size, etc
Power analysis		Power-based calculations
Sample size calculations	Power Based Sample Size Calculations An Introductin to Sample Size Calculations
Type I and Type II errors
Cohen d (effect size)
Introductory Hypothesis tests
Paired vs unpaired data
One-Sample T-test
T-tests (paired)	Paired t-tests booklet (PDF, XKB)
T-tests (unpaired)	Booklet
Chi-squared test
Fisher's exact test	Fisher’s Exact test (Word, XKB)

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