Regression: groups and interactions
Content for Thursday, March 11, 2027
Goals
By the end of this topic, you should be able to:
- Use a yes/no column to compare groups
- See t-tests and ANOVA as regression
- Read an interaction from a product column
- Say what adding baseline does to the standard error
- Say when a study earns the word “caused”
Reading
- Section 13-1, on main effects and interactions.
- Part 2 of our regression handout, on yes/no columns, two predictors and interactions.
- Practice: Problems 4 to 7 at the end of the handout. Solutions are on Canvas.