## G*Power (Intel Version)

Version: 3.0.10 ||
Release Date: 2008-01-24 ||
License: Freeware
Developer: http://www.psycho.uni-duesseldorf.de |
App Owner: alf

G*Power 3 covers statistical power analyses for many different statistical tests of the

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

G*Power 3 offers five different types of power analyses:

- A priori (sample size N is computed as a function of power level 1-Î², significance level Î±, and the to-be-detected population effect size)
- Compromise (both Î± and 1-Î² are computed as functions of effect size, N, and an error probability ratio q = Î²/Î±)
- Criterion (Î± and the associated decision criterion are computed as a function of 1-Î², the effect size, and N)
- Post-hoc (1-Î² is computed as a function of Î±, the population effect size, and N)
- Sensitivity (population effect size is computed as a function of Î±, 1-Î², and N)

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

There is a separate PPC version, as well as a Windows/Vista version. Register for free for info on updates.

Required OS: not specified

Tags:
**statistical**
, **power**
, **science**
, **statistics**
, **testing**
, **statistical**