calculating mean of variable across observations

[lone0708]

Hi,

I have a dataset, where i need to calculate the mean of all the variables across x observations.

Every person can have several card_times per exam_time. 

My dataset looks like this:

        exam_time card_time id var1 var2 var3

1

2

3

4

.

I need to calculate the mean of var1 var2 var3 with the same exam_time creating a new dataset containing only the mean of the variables = one line per exam time.

Any suggestions?

Thanks

[PaigeMiller]

proc summary data=have nway;
     class exam_time_card;
     var var1 var2 var3;
     output out=_means_ mean=/autoname;
run;