hwk3-3 - Post t est vs Pret est val ues. Dat a generat ed f...

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Unformatted text preview: Post t est vs Pret est val ues. Dat a generat ed f rom paral l el group model group 1 2 post 4 6 8 10 12 14 16 18 20 22 24 pre-3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 Response versus t i me (t i me=0 i s pret est , t i me=1 i s post t est ) Subj ect -speci f i c prof i l es connect ed group 1 2 y-10 10 20 30 t i me 0. 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 0. 8 0. 9 1. 0 Response versus t i me (t i me=0 i s pret est , t i me=1 i s post t est ) Subj ect -speci f i c prof i l es not connect ed group 1 2 y-10 10 20 30 t i me 0. 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 0. 8 0. 9 1. 0 ANCOVA model regressing posttest on pretest, w/ group-specific intercepts 1 Data generated from parallel group model This gives answer to part (a.iii) The Mixed Procedure Model Information Data Set WORK.ONE Dependent Variable post Covariance Structure Diagonal Estimation Method REML Residual Variance Method Profile Fixed Effects SE Method Model-Based Degrees of Freedom Method Residual Class Level Information Class Levels Values group 2 1 2 Dimensions Covariance Parameters 1 Columns in X 3 Columns in Z 0 Subjects 1 Max Obs Per Subject 80 Number of Observations Number of Observations Read 80 Number of Observations Used 80 Number of Observations Not Used 0 Covariance Parameter Estimates Cov Parm Estimate Residual 0.7755 Fit Statistics -2 Res Log Likelihood 210.8 AIC (smaller is better) 212.8 AICC (smaller is better) 212.8 BIC (smaller is better) 215.1 ANCOVA model regressing posttest on pretest, w/ group-specific intercepts 2 Data generated from parallel group model This gives answer to part (a.iii) The Mixed Procedure Solution for Fixed Effects Standard Effect group Estimate Error DF t Value Pr > |t| pre 0.5377 0.09476 77 5.67 <.0001 group 1 9.8582 0.1399 77 70.45 <.0001 group 2 14.5424 0.9707 77 14.98 <.0001 Type 3 Tests of Fixed Effects Num Den Effect DF DF F Value Pr > F pre 1 77 32.20 <.0001 group 2 77 2724.59 <.0001 Least Squares Means Standard Effect group Estimate Error DF t Value Pr > |t| group 1 12.5442 0.5068 77 24.75 <.0001 group 2 17.2284 0.5068 77 33.99 <.0001 Differences of Least Squares Means Standard Effect group _group Estimate Error DF t Value Pr > |t| group 1 2 -4.6842 0.9943 77 -4.71 <.0001 Analysis of change scores (equivalent to paired t-test) (strategy 3) 3 Data generated from parallel group model This gives answer to part (a.iv) The Mixed Procedure Model Information Data Set WORK.ONE Dependent Variable diff Covariance Structure Diagonal Estimation Method REML Residual Variance Method Profile Fixed Effects SE Method Model-Based Degrees of Freedom Method Residual Class Level Information Class Levels Values group 2 1 2 Dimensions Covariance Parameters 1 Columns in X 3 Columns in Z 0 Subjects 1 Max Obs Per Subject 80 Number of Observations...
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hwk3-3 - Post t est vs Pret est val ues. Dat a generat ed f...

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