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Unformatted text preview: 1 Chapter 5 worked problems 2/1/2010 Chapter 5 – Answers to selected problems 5.13 Election Study D R I N D R I N D R I N D R I N D R I N Total outcomes in Sample Space = 4 2 (4 ways 2 elections ) = 16 outcomes 4 3 = 64 possible outcomes for 3 elections. 5.16 More true-false questions: a. 2 10 = 1024 2 outcomes per question with 10 questions b. What is the only event that doesn’t fit the description of “at least one wrong”? Getting them all right is the only one that doesn’t fit so we use that idea to help us find the probability we are trying to determine. We will also use the rule that says that all of the probabilities must add up to 1. P(at least one wrong) = 1 – P(answers all right) c. 1 – 1/1024 = 1 – 9.77e-4 = 0.9990 5.22 True-blooded Republicans: False. The logic in this calculation is based upon the assumption that each trial is independent. Yet, who you vote for is likely not independent of whom you voted for the last time. Those who voted for him in 2000 were very likely to vote for him in 2004 also. him in 2000 were very likely to vote for him in 2004 also....
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This note was uploaded on 05/23/2010 for the course MATH math 208 taught by Professor C.eckerle during the Winter '10 term at Delta MI.
- Winter '10