anova1way.F.unbal: Power calculation for unbalanced one-way analysis of variance...

In powertools: Power and Sample Size Tools

Power calculation for unbalanced one-way analysis of variance omnibus F test

Description

Performs power calculation for an unbalanced (unequal group sizes) one-way ANOVA omnibus F test, which tests for any differences among group means. This function solves for power given other parameters. For balanced data (equal-sized groups), anova1way.F.bal can be used and solves for more parameters.

Usage

anova1way.F.unbal(
  nvec = NULL,
  mvec = NULL,
  sd = NULL,
  Rsq = 0,
  ncov = 0,
  alpha = 0.05,
  v = FALSE
)

Arguments

nvec	A vector of group sample sizes c(n1, n2, ...).
mvec	A vector of group mvec c(mu1, mu2, ...).
sd	The estimated standard deviation within each group.
Rsq	The estimated R^2 for regressing the outcome on the covariates; defaults to 0.
ncov	The number of covariates adjusted for in the model; defaults to 0.
alpha	The significance level or type 1 error rate; defaults to 0.05.
v	Either TRUE for verbose output or FALSE to output computed argument only.

Value

A list of the arguments (including the computed power).

Examples

anova1way.F.unbal(nvec = c(10, 20, 30), mvec = c(5, 10, 12), sd = 10)

powertools documentation built on April 4, 2025, 5:02 a.m.