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G*Power - 3.1.2

Statistical power analysis made easy.

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Current Version:	3.1.2
Release Date:	2010-02-01
License:	Freeware
Downloads (this version):	371
Downloads (all versions):	5,697

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Product Description:

G*Power 3 is a statistical power analysis program. It covers 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. G*Power 3 is free.

What's new in this version:

Renamed the Repetitions parameter in repeated measures procedures to Number of measurements (Repetitions was misleading because it incorrectly suggested that the first measurement would not be counted).
Fixed a problem in the sensitivity analysis of the logistic regression procedure: There was an error if Odds ratio was chosen as the effect size. The problem did not occur when the effect size was specified in terms of Two probabilities.
Mac version: The Window menu now contains the option to hide the distributions plot and the protocol section (Hide distributions & protocol menu item) so that G*Power can be accommodated to small screens. This option has been available for some time in the Windows version (see View menu).

Operating System Requirements:

This product is designed to run on the following operating systems:

Mac OS X 10.5 Intel
Mac OS X 10.5 PPC
Mac OS X 10.4 Intel
Mac OS X 10.4 PPC

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