Write a DATA step that creates a SAS data set (ASSIGN) containing 100 observations with variable SUBJ (from 1 to 100) and GROUP, which is either 'A' or 'B', where there is a 50-50 chance of bei.ng in either group. Run PROC FREQ to determine how many subjects are in group 'A' and how many are in group 'B'. They may not be equal.
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