Statistical Power Analysis for the Behavioral Sciences

99 Table a₁ a₂ alternate hypothesis analysis of covariance analysis of variance approximately Assume behavioral science cell Chapter coefficient Cohen & Cohen column f computed contingency tables conventional correlation defined denominator df desired power detect determine difference effect size equal error experiment experimental f n FC f Power 05 F test factorial design finds power formula given H₁ Illustrative Examples implies interaction investigator linear interpolation main effects n₁ nondirectional normal distribution Note null hypothesis operational definitions P₁ pairs parameter planning population means power analysis Power of x² power tables power values proportion psychologist r₁ RA,B rejecting the null relationship row power sample size tables Section significance criterion significance test specifications standard deviation statistical power statistical test tion variables variance accounted within-population x² test yield z transformation zero η² بلو جلها جليا