Re: Ask for help on sample size decision for a non-normal distribution


In article <1167470135.308372.189240@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,
Jane <jinyinglu@xxxxxxxxxxx> wrote:
Hello, group.

I have a problem on sample size decision. supposed that for a
sysmmetric distribution with mean=0 (but it is non-normal). How can I
decide the sample size that can garuntee that guarantee that the mean
of sample =0 with certian power.

Thanks very much.

Jane

As stated, it is impossible. You would at least need
some bounds on the tail of the distribution. For any
sample size and desired power, one can give a family
of distrubutions which will not achieve it.

--
This address is for information only. I do not claim that these views
are those of the Statistics Department or of Purdue University.
Herman Rubin, Department of Statistics, Purdue University
hrubin@xxxxxxxxxxxxxxx Phone: (765)494-6054 FAX: (765)494-0558
.