ex4 - Ex 4 proc glm data=gpa class gender*tells SAS that...

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Ex 4: proc glm data =gpa; class gender; /*tells SAS that gender is categorical*/ model gpa = gender concept iq / solution ; /*creates a model with different intercepts for each gender*/ run ; The GLM Procedure Class Level Information Class Levels Values gender 2 1 2 Number of Observations Read 78 Number of Observations Used 78 The SAS System 15:25 Thursday, May 8, 2008 2 The GLM Procedure Dependent Variable: gpa Sum of Source DF Squares Mean Square F Value Pr > F Model 3 176.7822283 58.9274094 26.81 <.0001 Error 74 162.6446631 2.1979009 Corrected Total 77 339.4268914 R-Square Coeff Var Root MSE gpa Mean 0.520826 19.90901 1.482532 7.446538 Source DF Type I SS Mean Square F Value Pr > F gender 1 3.2156809 3.2156809 1.46 0.2303 concept 1 104.0294673 104.0294673 47.33 <.0001 iq 1 69.5370801 69.5370801 31.64 <.0001 Source DF Type III SS Mean Square F Value Pr > F gender 1 16.87994270 16.87994270 7.68 0.0071 concept 1 23.62035604 23.62035604 10.75 0.0016 iq 1 69.53708008 69.53708008 31.64 <.0001 Standard Parameter Estimate Error t Value Pr > |t| Intercept -5.022359695 B 1.46953137 -3.42 0.0010 gender 1 0.968521031 B 0.34948426 2.77 0.0071 gender 2 0.000000000 B . . . concept 0.051292777 0.01564649 3.28 0.0016 iq 0.084116772 0.01495472 5.62 <.0001 NOTE: The X'X matrix has been found to be singular, and a generalized inverse was used to solve
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the normal equations.
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