例：DATA B; INPUT SEX SAGE NUMBER: CARDS; F2010 F2223 M2119 M2216 PROC MEANS VARAGE; PROC MEANS; FREQ NUMBER; VAR AGE; 1010 例：DATA B; INPUT SEX $ AGE NUMBER; CARDS ; F 20 10 F 22 23 M 21 19 M 22 16 PROC MEANS ; VAR AGE ; PROC MEANS ; FREQ NUMBER ; VAR AGE ;