Stats help

Hi all,

I have a question:

If I have five groups, overall significant one-way Anova, and I want to examine all pairwise tests, considering both Type I familywise and Type II error rates, which test is the better to conduct, tukey or fisher-hayter?

This test is not planned, and it is post-hoc, and alpha is o.o5

If anyone can help, really appreciate it. thanks