| twot.permutation {DAAG} | R Documentation |
This function computes the p-value for the two sample t-test using a permutation test. The permutation density can also be plotted.
twot.permutation(x1=two65$ambient, x2=two65$heated, nsim=2000, plotit=TRUE)
x1 |
Sample 1 |
x2 |
Sample 2 |
nsim |
Number of simulations |
plotit |
If TRUE, the permutation density will be plotted |
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.
The p-value for the test of the hypothesis that the mean of
x1 differs from x2
J.H. Maindonald
Good, P. 2000. Permutation Tests. Springer, New York.
twot.permutation()