hw11solution[1]

hw11solution[1] - Homework 11 Solution Solutions to SAS...

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Homework 11 Solution Solutions to SAS Problems 1. The ANOVA Procedure Class Level Information Class Levels Values trt 4 control t15 t40 t50 Number of observations 20 The ANOVA Procedure Dependent Variable: time Sum of Source DF Squares Mean Square F Value Pr > F Model 3 146.9500000 48.9833333 12.72 0.0002 Error 16 61.6000000 3.8500000 Corrected Total 19 208.5500000 R-Square Coeff Var Root MSE time Mean 0.704627 11.78463 1.962142 16.65000 Source DF Anova SS Mean Square F Value Pr > F trt 3 146.9500000 48.9833333 12.72 0.0002 Reject Ho because p=0.0002 <0.05, the means are not all equal. Scheffe's Test for time NOTE: This test controls the Type I experimentwise error rate. Alpha 0.05 Error Degrees of Freedom 16 Error Mean Square 3.85 Critical Value of F 3.23887 Minimum Significant Difference 3.8683 Means with the same letter are not significantly different. Scheffe Grouping Mean N trt A 20.400 5 t15 B A 17.200 5 t40 B C 16.200 5 control C 12.800 5 t50 Pairwise comparisons: Control is different from t15. t15 is different from t50 and t40 is different from t50.
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2. The ANOVA Procedure Class Level Information Class Levels Values trt 3 c t1 t2 Number of observations 18 Dependent Variable: symptoms Sum of Source DF Squares Mean Square F Value Pr > F Model 2 463.4444444 231.7222222 56.98 <.0001 Error 15 61.0000000 4.0666667 Corrected Total 17 524.4444444 R-Square Coeff Var Root MSE symptoms Mean 0.883686 19.30785 2.016598 10.44444 Source DF Anova SS Mean Square F Value Pr > F trt 2 463.4444444 231.7222222 56.98 <.0001 Reject Ho because p=0.0001 <0.05, the means are not all equal.
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This document was uploaded on 07/16/2009.

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hw11solution[1] - Homework 11 Solution Solutions to SAS...

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