options ps=54 ls=76 nodate nonumber; data one; input trt x1 x2 x3 y @@; x1=x1/3; x2=x2/3; x3=x3/3; cards; 1 3 0 0 106.6 1 3 0 0 105.0 2 0 3 0 83.3 2 0 3 0 81.4 3 0 0 3 99.4 3 0 0 3 91.4 4 1.5 1.5 0 94.1 4 1.5 1.5 0 91.4 5 1.5 0 1.5 101.9 5 1.5 0 1.5 98.0 6 0 1.5 1.5 92.3 6 0 1.5 1.5 86.5 7 1 1 1 96.3 7 1 1 1 91.7 ; run; proc glm; class trt; model y = x1 x2 x3 x1*x2 x1*x3 x2*x3 trt; run; proc glm; class trt; model y = x1 x2 x3 trt; run; proc glm; class trt; model y = trt; run; proc glm; model y = x1 x2 x3 / noint; run; proc glm; model y = x1 x2 x3 x1*x2 x1*x3 x2*x3 / noint; run;