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# ex6 - The ANOVA Procedure Class Level Information Class...

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The ANOVA Procedure Class Level Information Class Levels Values week 2 4 8 group 6 ECM1 ECM2 ECM3 MAT1 MAT2 MAT3 Number of Observations Read 36 Number of Observations Used 36 The SAS System 11:24 Thursday, May 29, 2008 8 The ANOVA Procedure Dependent Variable: gpi Sum of Source DF Squares Mean Square F Value Pr > F Model 11 27057.63889 2459.78535 114.26 <.0001 Error 24 516.66667 21.52778 Corrected Total 35 27574.30556 R-Square Coeff Var Root MSE gpi Mean 0.981263 11.55937 4.639804 40.13889 Source DF Anova SS Mean Square F Value Pr > F week 1 6.25000 6.25000 0.29 0.5950 group 5 27045.13889 5409.02778 251.26 <.0001 week*group 5 6.25000 1.25000 0.06 0.9975 Questions: 1) What are the dimensions of this ANOVA? 2) If there are an equal number of observations per cell, what is the number of observations  per cell? 3) What is the sample pooled standard deviation of the populations under study?

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Does it make sense to remove the variable group if week*group is in the model? 5)
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ex6 - The ANOVA Procedure Class Level Information Class...

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