Simple Linear Regression

Reading Assignment: Pages 29-53 in RWG;

EXAMPLE: Blood/Lead Data page 60 in RWG (sas commands)

OUTLINE: (continued)

• Residual Analysis: Checking Normality
  • Normal Quantile Plots of Residuals
  • Histograms and Boxplots of Residuals
• Confidence Intervals: estimate +/- t(alpha) SE(estimate)
  • parameters,
  • mean,
  • future observations.
• Conclusions and Study Design

Lead Example plots for this lecture:

Residual plots (residuals vs fitted) and Normal quantile plot

More Residual plots boxplot, histogram w/ Normal density, and quantiles of residuals.

Confidence and Prediction Intervals: Lead Example