I am having the same problem, however I am using PROC FREQ for the one way chi sq test, not just reporting. I have a expected proportion that, in the data, is not represented. My code is:
proc freq data = otptClinic;
tables Race / testp = (.59 .01 .08 .01 .31);
run;
These are the expected proportions of race in our outpatient clinic (Afr.Am, Nat.Am, Latino, Other, White). I am testing a subset of the data to see if there is any disparity of race in this subset. The subset contains 0 native American persons. I'd like this information included in the chi sq goodness of fit test (and not combine it with another group). However, I get an error when running this code, because the data only has 4 categories.
I am, at best, an average SAS user, but I thought PROC FREQ was my only option for the one way chi sq (and it does not appear that either PROC TABULATE or PROC REPORT have a chi sq option).
Is there a way to do this, or would I be stuck with combining categories?