手法を比較

	ANOVAのための検出力分析	t検定のための検出力分析
分野	統計学	統計学
系統	Hypothesis test	Hypothesis test
提唱年	1988	1969
提唱者	Jacob Cohen	Jacob Cohen
種類	Sample size determination	Sample size determination
原典	Cohen, J. (1988). Statistical Power Analysis for the Behavioral Sciences (2nd ed.). Lawrence Erlbaum Associates. ISBN: 978-0805802832	Cohen, J. (1988). Statistical Power Analysis for the Behavioral Sciences (2nd ed.). Lawrence Erlbaum Associates. ISBN: 978-0805802832
別名	ANOVA power analysis, F-test power analysis, sample size for ANOVA, Güç Analizi — ANOVA	t-test power analysis, sample size calculation for t-test, Güç Analizi — t-Testi
関連	4	5
概要	Power analysis for ANOVA is a prospective statistical technique that determines the minimum sample size needed to detect a specified group mean difference with a chosen probability. Formalized by Jacob Cohen in his 1988 monograph, it translates a researcher's effect size expectation — expressed as Cohen's f — along with the desired Type I error rate (alpha) and statistical power (1 − beta) into a concrete per-group sample size recommendation for one-way or factorial ANOVA designs.	Power analysis for the t-test is a sample size planning procedure that determines how many participants are required to detect a mean difference of a given magnitude with acceptable probability. Formalised by Jacob Cohen in his 1969 and 1988 editions of Statistical Power Analysis for the Behavioral Sciences, it links four quantities — effect size (Cohen's d), significance level (α), statistical power (1 − β), and sample size — so that fixing any three allows calculation of the fourth.