The SAS System 13 11:39 Wednesday, April 18, 2007 The GLM Procedure Number of Observations Read 72 Number of Observations Used 68 The SAS System 14 11:39 Wednesday, April 18, 2007 The GLM Procedure Dependent Variable: Y Weight: Freq Sum of Source DF Squares Mean Square F Value Pr > F Model 2 425.630185 212.815092 7.85 0.0009 Error 65 1761.466589 27.099486 Corrected Total 67 2187.096774 R-Square Coeff Var Root MSE Y Mean 0.194610 89.15868 5.205717 5.838710 Source DF Type I SS Mean Square F Value Pr > F U 1 5.9392307 5.9392307 0.22 0.6412 U2 1 419.6909541 419.6909541 15.49 0.0002 Source DF Type III SS Mean Square F Value Pr > F U 1 414.8110959 414.8110959 15.31 0.0002 U2 1 419.6909541 419.6909541 15.49 0.0002 Standard Parameter Estimate Error t Value Pr > |t| Intercept 4.2768977 0.55336973 7.73 <.0001 U 36.2380923 9.26233897 3.91 0.0002 U2 -125.2658465 31.83086201 -3.94 0.0002