Introduction

Howdy!

In-Lab Schedule

1. A note on ANCOVA Shapiro-Wilk and Heteroskedasticity - test the assumption on the model with the covariate term

   # Fit ANCOVA model
   model <- lm(outcome ~ group + covariate, data = mydata)
   
   # Extract standardized residuals
   residuals <- rstandard(model)
   
   # Check normality
   shapiro.test(residuals)
   qqnorm(residuals)
   qqline(residuals)
   hist(residuals)

2. Analysis of Frequencies

3. Activity

Notes

• next week - 11/13 - no lab, assignment 5 is due to me by email

• 11/20 - assignment 5 review, 503 review, 504 preview, any other topics?