Day 25: Statistics for Business Applications

Last Time: More on testing the difference in two means
Next time: Collect homework 13.4
Return homework 13.1-2
- Graded 33ab (Tastee, which we did last time), and
- Problem 37ab
If you wish, you may hand in the review exercises to replace another homework assignment.
If you wish to hand in the chapter 12 review problems, do so by Thursday, 4/17.
Questions about old stuff?
Today:
- More on the difference between two means (paired samples):
  - Practice Calculation Exercise 13.60, p. 424 (Warning to confidence interval testers!)
- Difference in proportions
  - Example: 3.111, p. 444
  - M & Ms
    - Does your proportion of browns differ from the 30% expected?
    - Is there evidence that you and your neighbor have different proportions of browns?
Next time: Regression (Section 18.1-3)

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