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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.

What's New in G*Power

  • Fixed a bug in "Linear bivariate regression: One group, size of slope". Negative effect directions, that is, slope|H1 < slope|H0, were not always handled correctly. Furthermore, the restriction (|slope| < |sy/sx|) on the effect size, which was previously ignored, is now checked

Requirements for G*Power

  • OS X 10.7 or later
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G*Power User Discussion

5 2
Current Version (3.x)
Downloads 52,258
Version Downloads 344
License Free
Date 05 Jun 2019
Platform Intel 64 / OS X
Price Free
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