## Session 2: The Language of Hypothesis Testing; Interactions

- Hypothesis Testing

  - Hypothesis testing (slides)
  - Notes on hypothesis testing
  - An hypothesis-testing tool
  - Additional slides from Session 1
  - Exercises on hypothesis testing with answers
  - Life and death, and statistics

- A challenging and important question

- "What's the difference between what I learn from the significance levels, and from the beta-weights?"
  Read here.

- Summary: Hypothesis testing
- Summary: Regression analysis

- Regression modeling: Structural variations (1)
  - Interactions (slides)
  - Notes on interactions

- Assignment (after Session 2)

  - Work through the "Caligula's Castle" dataset.
  - If time permits, also work through the "Hans and Franz" dataset.

- Exercises
  - "Caligula's Castle" dataset and description
    - Optional background readings on Harrah's Entertainment Inc.
    - Questions
    - Answers
  - "Hans and Franz" dataset and description
    - Questions
    - Answers
  - Evanston Wadgets - Delivery times