I am going to do the residual analyze. So I need the residual plot. I am not sure how to fix the error.     DATA Golf; INPUT Season $ Score; Datalines; Summer 83 Summer 85 Summer 85 Summer 87 Summer 90 Summer 88 Summer 88 Summer 84 Summer 91 Summer 90 Shoulder 91 Shoulder 87 Shoulder 84 Shoulder 87 Shoulder 85 Shoulder 86 Shoulder 83 Winter 94 Winter 91 Winter 87 Winter 85 Winter 87 Winter 91 Winter 92 Winter 86 ; proc print; run;   PROC REG DATA=Golf; Model Score =Season; Run;   ERROR: Variable Season in list does not match type prescribed for this list.     ... View more