n.indep.t.test.eq       Sample size for independent Student's t-test
                        with equal group size
n.indep.t.test.neq      Sample size for independent Student's t-test
                        with unequal group size
n.paired.t.test         Sample size for paired Student's t-test
n.welch.test            Sample size for Student's t-test with Welch
                        approximation
n.wilcox.ord            Sample size for Wilcoxon-Mann-Whitney for
                        ordinal data
samplesize-package      Computes sample size for several two-sample
                        tests
