Sample Size Calculator
Two-sample t-Test Paired t-Test Analysis of variance Wilcoxon Test Single proportion Chi-squared Test Fisher's exact Test McNemar's Test Logrank Test Correlation Test
Sample size calculator
Version 1.061


Input and calculation

 /  =


Press the Calculate button to calculate the sample size.





Sample size for a two-sample Wilcoxon Mann-Whitney U-Test

The sample size and power for the two-sample Wilcoxon Mann-Whitney U-Test are calculated according to Section 3 of [Noether, G. E. (1987). Sample size determination for some common nonparametric tests. Journal of the American Statistical Association, 82(398), 645-647.]

Specific options