G*Power

You must cite this article if you use its information in other circumstances. An example of citing this article is:
Ronny Gunnarsson. G*Power [in Science Network TV]. Available at: https://science-network.tv/introductions-overviews/introduction-to-computer-software/gpower/. Accessed September 18, 2019.
Suggested pre-reading What this web page adds
  1. Introduction to statistics
  2. Choosing statistical analysis
  3. Sample size estimation
This web-page provides an introduction to the statistical software G*Power. Reading this will give you enough knowledge to be able to try doing simple things in G*Power.

(Still under construction but there is some useful information below.)

G*Power is a software that can make sample size calculations and power estimations. It can manage most types of statistical tests except  Cox regression. G*Power can be downloaded from Dussedorf University.

Examples for comparing two groups

Click to watch any of these videos.

Example 1 of sample size calculation for comparing two groups – T-test and Mann-Whitneys test
 
Example 2 of sample size calculation for comparing two groups – T-test and Mann-Whitneys test

Example for Logistic regression

Click to watch any of these videos.

Example of sample size calculation for unconditional binary Logistic regression when the independent variable is binary (such as gender)

Useful links

You must cite this article if you use its information in other circumstances. An example of citing this article is:
Ronny Gunnarsson. G*Power [in Science Network TV]. Available at: https://science-network.tv/introductions-overviews/introduction-to-computer-software/gpower/. Accessed September 18, 2019.

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