2/7/2011

See Chapter2-Intervals.ppt

• Intervals for regression
  • Confidence intervals for the mean
  • Prediction intervals for a new observation
• CIs and PIs with software
• Unusual cases in SLM
• Outliers
  • Standardized residuals
  • Studentized residuals
• Influential points
  • Leverage

In Class Exercises

• Demo for Breakfast Cereal - see Exercise 2.6 on p. 74 and Cereal.R
• Compute confidence intervals and prediction intervals for the Palm Beach and Olympic Long Jump data sets.
• Calculate and plot the residuals, standardized residuals, and studentized residuals against Year for the Olympic Long Jump data. Identify Bob Beaman on your plots.
• What is the leverage value hi for Bob Beaman?

We will finish simple linear regression and move on to multiple regression models on Wednesday. Please read Sections 3.1 and 3.2.