10/27/2011

Chapter 7 Multiple Regression II

• Type I Sums of Squares - see Bodyfat.R
• Type II Sums of Squares
• Using extra sums of squares to test hypotheses for betas
  • Full versus reduced model approach
• Coefficients of partial determination
• Standardized multiple regression model - see Dwaine-Studios.R
• Multicollinearity

Chapter 8 Polynomial Regression Models

• To avoid problems with multicollinearity, center the predictor variables - see Powercell.R

We will have a problem session and continue with Chapter 8 on Tuesday.