1. MA 102 Statistical Controversies Monday, February 18, 2002 Today: Discuss Chapter 9 concepts and exercises Review Part 1 of the text Test 1 question types Reading (for Wednesday): None. Study for test Exercises: None

2. Reviewing Part 1 Go back over the lecture slides and notes Go back over exercises and HW#1 Read Part 1 Review If you want, work on Part 1 Review Exercises

3. Test 1 Question Types Identification Example: Define simple random sample (SRS) Short Answer Example: For 95% confidence, compute the margin of error in a statistic gathered from a SRS of size 500. Supported True-False Lurking variables are rare in observational studies.