2/22/2021

Discussion of Quiz #1

See Sec3.2R

• More on Multiple Regression
  • Inference for multiple regression
  • Partitioning Variability
  • Adjusted R-squared
  • Confidence intervals for a mean response
  • Prediction intervals for a new response

R Demonstration

• See Kids198.R script for a variety of new commands
  

See Sec3.3R

• Comparing two regression lines
  • Fitting separate regression lines (for different levels of a group variable)
  • Indicator variables
  • Comparing intercepts
  • Comparing slopes
  • Nested F-test

R LAB

• Exercise 3.32 on p. 147

Please read Section 3.4 for class on Wednesday.