Welcome to STAT 401A

The slide sets correspond to the material in the corresponding chapters of The Statistical Sleuth (3rd edition).

Slide sets

Chapter 1 (R code)
- Samples vs populations
- Random sample -> Inferences to populations
- Randomized treatment -> Causal inference
Chapter 2 (R code)
- Two-sample t-test
- Paired t-test
Chapter 3 (R code)
- Assumptions in t-tests
Chapter 4 (R code)
- Nonparametrics for two group comparisons
Chapter 5 (R code)
- Comparing two means in multi-group data
- One-way ANOVA F-test
- General F-tests
Chapter 6 (R code)
- Contrasts
- Multiple comparison adjustments
Chapter 7 (R code)
- Simple linear regression
Chapter 8 (R code)
- Regression diagnostics
- Interpretations when using logs
Chapter 9 (R code)
- Multiple regression
  - Higher order terms
  - Additional explanatory variables
  - Categorical variables
  - Interactions
Chapter 10 (R code)
- Inference in multiple regression models
  - Coefficients
  - Contrasts
  - Predictions
  - F-tests
Chapter 11 (R code)
- Case statistics
  - Leverage
  - Cook’s D
  - (Externally) studentized residuals
Chapter 12 (R code) (Ames housing price example, R code)
- Stepwise variable selection
- Model selection criterion: AIC, BIC
Chapter 13 (R code) (data)
- Two-way ANOVA
Chapters 20-22 (R code)
- Logistic regression
- Poisson regression