Trusted Mac download G.Power 3.1.9.6. Virus-free and 100% clean download. Get G.Power alternative downloads. G.Power provides effect size calculators and graphics options. G.Power supports both a distribution-based and a design-based input mode. It contains also a calculator that supports many central and noncentral probability distribu-tions. G.Power is free software and available for Mac OS X and Windows XP/Vista/7/8. 1.1 Types of analysis.
G*Power is a statistical power analysis program. It is a major extension of, and improvement over, the previous version, covering many different statistical tests of the F, t, chi-square, and z test families as well as some exact tests. G*Power 3 provides improved effect size calculators and graphics options, it supports both a distribution-based and a design-based input mode, and it offers five different types of power analyses. Like its predecessors, G*Power 3 is free.
Release Notes
Version 3.1.9.6: 
Fixed:
G*power For Mac Os
G*power Statistical Power Analyses For Windows And Mac
- A bug in z tests: Generic z test: Analysis: Criterion: Compute alpha: The critical z was calculated incorrectly.
- A bug in t tests: Linear bivariate regression: One group, size of slope: |sy/sx| was sometimes calculated inccorrecty.