data dummy; input group y; if group=1 then x1=1; if group ne 1 then x1=0; if group=2 then x2=1; if group ne 2 then x2=0; cards; 1 4 1 5 1 6 1 7 1 8 2 7 2 8 2 9 2 10 2 11 3 1 3 2 3 3 3 4 3 5 ; proc reg; model y=x1 x2 / adjrsq stb; The SAS System 19:12 Wednesday, December 22, 1999 1 Model: MODEL1 Dependent Variable: Y Analysis of Variance Sum of Mean Source DF Squares Square F Value Prob>F Model 2 90.00000 45.00000 18.000 0.0002 Error 12 30.00000 2.50000 C Total 14 120.00000 Root MSE 1.58114 R-square 0.7500 Dep Mean 6.00000 Adj R-sq 0.7083 C.V. 26.35231 Parameter Estimates Parameter Standard T for H0: Variable DF Estimate Error Parameter=0 Prob > |T| INTERCEP 1 3.000000 0.70710678 4.243 0.0011 X1 1 3.000000 1.00000000 3.000 0.0111 X2 1 6.000000 1.00000000 6.000 0.0001 Standardized Variable DF Estimate INTERCEP 1 0.00000000 X1 1 0.50000000 X2 1 1.00000000