2/18/2011

See Chapter4-AVP.ppt

• Another look at second order models
• Multicollinearity
• Variance Inflation Factor (VIF)
• Added variables plot
• Identifying unusual residuals and influential points
  • Standardized residuals
  • Studentized residuals
  • Leverage
  • Cook's distance

R LAB

• Identify unusual and influential points in the perch data and the StateSAT data.
• Complete the variable added plot handout.

Please read Section 4.2 for class on Monday.