9/23/2026

See GoogleDrive\Stat206-DataAnalysis-S2026\2ePowerPoint\Sec3.1R

• Multiple Regression
  • Model
  • Correlation matrix
  • Prediction equation
  • t-test for slope
  • ANOVA for overall fit
  • Std. deviation of error
  • R-squared

Demonstration

• See GoogleDrive\Stat206-DataAnalysis-S2026\2eMarkkdown\Sec3.1.Rmd
• See Kids198.R script for a variety of new commands
  

See GoogleDrive\Stat206-DataAnalysis-S2026\2ePowerPoint\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

See GoogleDrive\Stat206-DataAnalysis-S2026\2ePowerPoint\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 Demonstration

• See GoogleDrive\Stat206-DataAnalysis-S2026\2eMarkkdown\Sec3.2.Rmd
• See GoogleDrive\Stat206-DataAnalysis-S2026\2eMarkkdown\Sec3.3.Rmd

In class exercises

• 3.13, 3.20, 3.22, 3.32, 3.44

Please read Sections 3.4, 3.5, and 3.6 for class on Friday.