# Lecture 14: Two-Sample Testing

November 1st, 2022 (8th week of classes)**Two-sample testing and associated study designs**

In this lecture we will develop further knowledge about the effect of sample sizes on statistical hypothesis testing. One important element is that the statistical power of tests increase with sample size. In this lecture we also cover different types of study designs (paired versus independent designs) and associated statistical testing frameworks for studies involving two samples.

Types of study designs (paired samples versus independent samples). The paired t-test for comparing two (non-independent) sample means.

**Two Sample t-test for Independent Groups, by Marin Stats Lectures **

**Watch for your own interest; no need if you don’t want to**

**Paired t-test, by Marin Stats Lectures**

**Watch for your own interest; no need if you don’t want to**

**Lecture**

Slides:

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Video: