3/23/2011

RStudio

• Try opening the file Dwaine-Studios.R from "/shared/hartlaub@kenyon.edu/Regression"
• Load the package QuantPsych

Chapter 7 Multiple Regression II

• 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

Please read Sections 8.1 and 8.2 for class on Friday.