options formdlim='-'; title 'Exercises 11.3, 13.11, and 13.12, 4th edition, Stat. Methods.'; run; data eysenck; INPUT AGE $ L_O_P $; DO I=1 TO 10; INPUT ITEMS @@; OUTPUT; END; cards; Young Low 8 6 4 6 7 6 5 7 9 7 Young High 21 19 17 15 22 16 22 22 18 21 Old Low 9 8 6 8 10 4 6 5 7 7 Old High 10 19 14 5 10 11 14 15 11 11 PROC ANOVA; CLASS AGE L_O_P; MODEL ITEMS=AGE|L_O_P; MEANS AGE|L_O_P; PROC SORT; BY AGE; PROC ANOVA; CLASS L_O_P; MODEL ITEMS=L_O_P; BY AGE; PROC SORT; BY L_O_P; PROC ANOVA; CLASS AGE; MODEL ITEMS=AGE; BY L_O_P; run;