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samplesize (version 0.1-7)

a collection of sample size functions

Description

Computes sample size for Student's t-test with equal and nonequal variances and for the Wilcoxon-Mann-Whitney test for categorical data with and without ties

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Version

Install

install.packages('samplesize')

Monthly Downloads

338

Version

0.1-7

License

GPL (>= 2)

Maintainer

Ralph Scherer

Last Published

March 19th, 2010

Functions in samplesize (0.1-7)

samplesize-package

Computes sample size for several two-sample tests

n.wilcox.ord

Sample size for Wilcoxon-Mann-Whitney for ordinal data

n.indep.t.test.eq

Sample size for independent Student's t-test with equal group size

n.paired.t.test

Sample size for paired Student's t-test

n.indep.t.test.neq

Sample size for independent Student's t-test with unequal group size

n.welch.test

Sample size for Student's t-test with Welch approximation