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1 CHAPTER 6 SECTION 1: PROBABILITY MULTIPLE CHOICE 1. An approach of assigning probabilities which assumes that all outcomes of the experiment are equally likely is referred to as the: a. subjective approach b. objective approach c. classical approach d. relative frequency approach ANS: C PTS: 1 REF: SECTION 6.1 2. If A and B are mutually exclusive events with P ( A ) = 0.70, then P ( B ): 3. If you roll a balanced die 50 times, you should expect an even number to appear: 4. The collection of all possible outcomes of an experiment is called: 5. Which of the following is an approach to assigning probabilities? a. Classical approach b. Relative frequency approach c. Subjective approach d. All of these choices are true. ANS: B PTS: 1 REF: SECTION 6.1
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2 6. A sample space of an experiment consists of the following outcomes: 1, 2, 3, 4, and 5. Which of the following is a simple event? 7. Which of the following is a requirement of the probabilities assigned to outcome O i ? 8. If an experiment consists of five outcomes with P ( O 1 ) = 0.10, P ( O 2 ) = 0.20, P ( O 3 ) = 0.30, P ( O 4 ) = 0.15, then P ( O 5 ) is 9. Of the last 500 customers entering a supermarket, 50 have purchased a wireless phone. If the relative frequency approach for assigning probabilities is used, the probability that the next customer will purchase a wireless phone is a. 0.10 b. 0.90 c. 0.50 d. None of these choices. ANS: A PTS: 1 REF: SECTION 6.1 10. If two events are collectively exhaustive, what is the probability that one or the other occurs?
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