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windows default iconG*Power Publisher's description

G*Power 3 is a major extension of, and improvement over, G*Power 2.

G*Power 3 is a major extension of, and improvement over, G*Power 2. It covers statistical power analyses for many different statistical tests of the

F test,
t test,
П‡2-test and
z test families and some
exact tests.

G*Power 3 offers five different types of statistical power analysis:

A priori (sample size N is computed as a function of power level 1-ОІ, significance level О±, and the to-be-detected population effect size)
Compromise (both О± and 1-ОІ are computed as functions of effect size, N, and an error probability ratio q = ОІ/О±)
Criterion (О± and the associated decision criterion are computed as a function of 1-ОІ, the effect size, and N)
Post-hoc (1-ОІ is computed as a function of О±, the population effect size, and N)
Sensitivity (population effect size is computed as a function of О±, 1-ОІ, and N)

G*Power 3 provides improved effect size calculators and graphics options. It supports both a distribution-based and a design-based input mode.

What's New in This Release:

В· Fixed a bug in the ANCOVA module. Changing the number of covariates now correctly leads to the appropriate change in the denominator degrees of freedom.

System Requirements:

No special requirements.
Program Release Status: New Release
Program Install Support: Install and Uninstall

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