[R] another statistical question

[Anna Lee]

Dear List!

I have a unverse (basic population) which is not normally distributed.
Now from this universe I take some subsets. Each subset is normally
distributed within itself. I now want to compare the subsets and see
if they differ significantly. So what is my assumption - normal
distributed data and therefore comparison of means, or non normal
distributed data and therefore comparison of medians?


Cheers, Anna
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