How can i set hypothesis?

[glee217]

I'd like to test hypothesis, where the difference between genders regards to writing ability.

My hypothesis is that females would have higher score than males.

And i was going to use 'proc glm' or 'proc reg' to test about it but the error says:

ERROR: Variable gender in list does not match type prescribed for this list.

So is it meaning that i can't use categorical variables to test hypothesis?

Here is my code:

proc reg data=temp;
model write = gender;
run;

[Kurt_Bremser]

All variables in the model statement need to be numeric. Try setting a new gender variable to, say, 0 for female and 1 for male.

[Rick_SAS]

Just add gender as a class variable and use PROC GLM:

proc glm data=temp;
class gender;
model write = gender;
run;

 If your primary purpose is to conduct a t test for the difference of means, you can use PROC TTEST, which supports one- or two-sides tests of hypothesis. See the Getting Started example for PROC TTEST.