t tests - Means: Wilcoxon-Mann-Whitney test (two groups) Options: A.R.E. method Analysis: A priori: Compute required sample size Input: Tail(s) = One Parent distribution = min ARE Effect size d = 0.9076923 α err prob = 0.05 Power (1-β err prob) = 0.95 Allocation ratio N2/N1 = 1 Output: Noncentrality parameter δ = 3.3748581 Critical t = 1.6739508 Df = 53.2960000 Sample size group 1 = 32 Sample size group 2 = 32 Total sample size = 64 Actual power = 0.9541689
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