st: Permute

[Raphael Fraser <raphael.fraser@gmail.com>]

Dear All,

Can anyone explain why the distribution of the test statistic is 384
for all 1000 permutations?

      ct   grp
    121     1
    150     1
    113     1
     90     0
     80     0
     85     0

permute ct sum=r(sum), saving(permsum, replace) seed(1440) reps(1000):
sum ct if grp
use permsum, clear

Raphael

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