Hi all,

I have data that looks like

number|grouping


I would like to preform stats for each grouping

so

1|5
6|5
10|5
11|5
3|9
5|9
10|9

Say I would like to take the median for above, I should be returned 2 lines,
one for group #5 and one for group #9

Does this make sense?

I am sorry for the basic question, can someone give me the name of a good
book as well?

Thanks,
Lotta

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