Summary

Inference for Linear Regression in R

Jo Hardin

Professor, Pomona College

Linear regression as model

• It estimates an underlying population model
• It might be linear or might need variable transformations
• All of LINE conditions should be checked
• Other variable relationships should be carefully considered

Linear regression as an inferential technique

• Hypothesis testing using a mathematical model (t-tests)
• Hypothesis testing using randomization tests
• Confidence intervals using a mathematical model
• Confidence intervals using bootstrapping

Let's practice!

Inference for Linear Regression in R