Hi all:
I have a question on sample size calculation of 2 groups of data. If 2
groups of data are all normal distribution, then I can use the function
"n.indep.t.test.eq" from samplesize package.But if 2 groups of data are all
skewed distribution, but not normal distribution,how can I calculate the
sample size then?
I've tried many transformation (e.g. log arcsin…) in order to transfer the
skewed distribution data into normal distribution data, but failed. So what
I can do is only find a calculation method to do with skewed data.

Any suggestions from you are welcome.
Thanks a lot for your help.

My best.

	[[alternative HTML version deleted]]

