Dear all, From F table, could find the F(7,10),0.05=3.14, but SAS output (see the bottom of picture) Pr> F(=3.65) = 0.0639. There was something wrong ? * SAS code; data unequal_var;
input disease $ time @@;
cards;
A 36 A 32 A 24 A 35 A 26 A 28 A 32 A 33 A 34 A 29 A 32
B 35 B 24 B 13 B 27 B 22 B 18 B 31 B 30
;
proc ttest;
class disease;
run;
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