DAAG (version 0.37)

twot.permutation: Two Sample Permutation Test

Description

This function computes the p-value for the two sample t-test using a permutation test. The permutation density can also be plotted.

Usage

twot.permutation(x1=two65$ambient, x2=two65$heated, nsim=2000, plotit=TRUE)

Arguments

x1

Sample 1

x2

Sample 2

nsim

Number of simulations

plotit

If TRUE, the permutation density will be plotted

Value

• The p-value for the test of the hypothesis that the mean of x1 differs from x2

Details

Suppose we have n1 values in one group and n2 in a second, with n = n1 + n2. The permutation distribution results from taking all possible samples of n2 values from the total of n values.

References

Good, P. 2000. Permutation Tests. Springer, New York.

Examples

data(two65)
twot.permutation()