data test;
input x g;
cards;
6.753817259 1
3.85135222 1
4.814271392 1
2.245120725 1
5.52147289 1
11.98764696 1
7.742523453 1
12.39296607 1
5.06539771 1
7.719907289 1
11.03952862 1
9.3323714 1
5.61979284 2
6.193234971 2
2.700010297 2
10.5703048 2
7.707832442 2
8.05257763 2
12.57540877 2
4.085322987 2
2.240645785 2
6.183556004 2
10.5586166 2
6.514341911 2
6.505939584 2
8.081699371 2
8.156127896 2
5.712623185 2
5.79272472 2
4.462673223 2
6.030891342 2
;
proc ttest data=test;
class g;
var x;
run;
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