n_ttest: Sample size of a t-test

In tobiasmuetze/varmap: Tools Related to MAP Priors for Variances

Sample size of a t-test

Description

Sample size calculation of a one-sided two-sample t-test from the non-central t-distribution. The variances are equal between the groups, the sample sizes must not be equal.

Usage

n_ttest(variance, alloc, delta, sig_level, power)

Arguments

variance	assumed within-group variance
alloc	numeric vector of sample size proportion within group
delta	assumed treatment effect
sig_level	level of significance
power	target power

Value

sample size of the one-sided two-sample t-test

Examples

n_ttest(variance = 1, alloc = c(0.5, 0.5), delta = 0.5,
        sig_level = 0.025, power = 0.8)

tobiasmuetze/varmap documentation built on Dec. 8, 2022, 2:16 p.m.