9nov2011

# 9nov2011 - CR Long C532 Regression Modeling 9 Nov 2011...

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CR Long C532: Regression Modeling 9 Nov 2011 1 Learning Objectives 1. Understand the ANCOVA model 2. Use the SPSS general linear model procedure to analyze data under the ANCOVA model Review: 1. ANOVA model represented as a simple linear regression model i i i X Y 1 1 0 , where 1 X represents the explanatory variable which is a nominal categorical variable with 2 levels. 2. The regression of Y on X 2 is a simple linear regression model, i i i X Y 2 2 0 , where 2 X represents the explanatory variable which is a continuous variable. Analysis of covariance ( ANCOVA model) represents a multiple linear regression model i i i i X X Y 2 2 1 1 0 , where 1 X represents one explanatory variable which is a nominal categorical variable with 2 levels and 2 X represents another explanatory variable which is a continuous variable (also called the covariate ). ANOVA Table for 1:

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9nov2011 - CR Long C532 Regression Modeling 9 Nov 2011...

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