2/17/2020

See Sec 4.2R

• Predictor selection methods
• Possible Criteria
  • All Subsets
  • Mallow's Cp
  • Backward elimination
  • Forward selection
  • Stepwise

Handouts

• All Subsets Regression
• Permutation Test for Correlation

Sec 4.4R

• Identifying unusual residuals and influential points
  • Standardized residuals
  • Studentized residuals
  • Leverage
  • Cook's distance
  • dffits
  • dfbetas

R LAB

• Identify unusual and influential points in the perch data and the StateSAT data.
• Use best subsets and stepwise regression to identify the best model for predicting winning percentage for MLB teams in MLB2007Standings. (See Exercise 4.3 on p. 188.)

Please complete your reading of Sections 4.5 and 4.6 for Wednesday.