1. OBJECTIVES 1. 2. 3. HW REMINDERS Ch. 12 # 29, 31, 32 HW Discussion Biased Samples Quiz Tuesday Dec. 11 Ch. 12 & 13

2. 1. Which of the following are true statements? I. If bias is prersent in a sampling procedure, it can be overcome by dramatically increasing sample size. II. There is no such thing as a "bad sample". III. Sampling techniques that use probability techniques efficiently eliminate bias. A. I only B. II only C. III only D. None of the statements are true E. None of the above gives a complete set of true responses. (Question taken from Barron's AP Statistics Review Guide 2007 (3rd Edition))

3. 1. Which of the following are true statements? I. If bias is prersent in a sampling procedure, it can be overcome by dramatically increasing sample size. II. There is no such thing as a "bad sample". III. Sampling techniques that use probability techniques efficiently eliminate bias. A. I only B. II only C. III only D. None of the statements are true E. None of the above gives a complete set of true responses. (Question taken from Barron's AP Statistics Review Guide 2007 (3rd Edition))

4. (Question taken from Barron's AP Statistics Review Guide 2007 (3rd Edition)) A questionnaire is being designed to determine whether most people are or are not in favor of legislation protecting the habitat of the spotted owl. Give two examples of poorly worded questions, one biased toward each response.