G*Power is a tool to compute statistical power analyses for many different t tests, F tests, ?2 tests, z tests and some exact tests. G*Power can also be used to compute effect sizes and to display graphically the results of power analyses.
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Version 188.8.131.52: 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 correclty. Furthermore, the restriction (|slope| < |sy/sx|) on the effect size, which was previously ignored, is now checked.