An official website of the United States government Here's how you know

U.S. Department of Health and Human Services | National Institutes of Health

Official websites use .gov
A .gov website belongs to an official government
organization in the United States.

Secure .gov websites use HTTPS
A lock (🔒) or https:// means you've safely connected to the .gov website.
Share sensitive information only on official, secure websites.

Part 3: Sample Size and Power

Part 3 explores power and sample size for group-randomized trials (GRTs), individually randomized group-treatment (IRGT) trials, and stepped wedge group-randomized trials (SWGRTs). It introduces resources from NIH'sResearch Methods Resources websitethat can be used for power and sample size estimation in these designs and provides a brief tutorial for sample size estimation in a parallel GRT.

Part 3: Sample Size and Power [current-page:title] Recorded in September 2024 https://youtu.be/eSf59_d0kwk 1