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

Contact:

robin.ristl@univie.ac.at

Version 1.061

Contact:

robin.ristl@univie.ac.at

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Advanced

The required number of events and the power for the logrank test are calculated according to Schoenfeld's formula, see [Schoenfeld, D. (1981). The asymptotic properties of nonparametric tests for comparing survival distributions. Biometrika, 68(1), 316-319.] and [Schoenfeld, D. A. (1983). Sample-size formula for the proportional-hazards regression model. Biometrics, 499-503.]

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