power.fisher.test {statmod}R Documentation

Power of Fisher's Exact Test for Comparing Proportions

Description

Calculate by simulation the power of Fisher's exact test for comparing two proportions given two margin counts.

Usage

power.fisher.test(p1, p2, n1, n2, alpha=0.05, nsim=100)

Arguments

p1

first proportion to be compared

p2

second proportion to be compared

n1

first sample size

n2

second sample size

alpha

significance level

nsim

number of simulated data sets

Details

Computes the power of Fisher's exact test for testing the null hypothesis that p1 equals p2 against the alternative that they are not equal.

Value

Estimated power of the test

Author(s)

Gordon Smyth

See Also

fisher.test, power.t.test

Examples

power.fisher.test(0.5,0.9,20,20) # 70% chance of detecting difference

[Package statmod version 1.4.13 Index]