I am getting the same error. I am having trouble posting my question. Why do I keep getting the error "the class variable has more than two levels"? My code: data name;
input one two @@;
cards;
16.03 16.02 16.04 15.97 16.05 15.96 16.05 16.01 16.02 15.99
16.01 16.03 15.96 16.04 15.98 16.02 16.02 16.01 15.99 16.00
;
proc ttest data=name;
class one;
var two;
run;
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