Ch06 - CHAPTER6 PROBABILITY Inthefollowing please circlethe...

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CHAPTER 6 PROBABILITY   MULTIPLE CHOICE QUESTIONS In the following  multiple-choice questions, please circle the correct answer. 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 ANSWER: c 2. If  P ( A ) = 0.84,  P ( B ) =0.76 and   P ( A  or  B ) =0.90, then  P ( A  and   B ) is: a. 0.06 b. 0.14 c. 0.70 d. 0.83 ANSWER: c 3. If  P ( A ) = 0.35,  P ( B ) = 0.45 and   P ( A  and   B ) =0.25, then  P ( A / B ) is: a. 1.4 b. 1.8 c. 0.714 d. 0.556 ANSWER: 4. If  P ( A ) = 0.20,  P ( B ) = 0.30 and   P ( and   B ) = 0.06, then   A  and   B  are: a. dependent  events b. independent  events c. mutually exclusive events d. complementary  events ANSWER: b 71
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72 Chapter Six 5. If  and   are mutually exclusive events with  P ( A ) = 0.70, then  P ( B ): a. can be any value between  0 and  1 b. can be any value between  0 and  0.70 c. cannot be larger than 0.30 d. cannot be determined  with the information  given ANSWER: c 6. If  A  and   B  are independent  events with   P ( A ) = 0.60 and   P ( A / B ) = 0.60, then  P ( B ) is: a. 1.20  b. 0.60 c. 0.36 d. Cannot  be determined  with the information  given ANSWER: d 7. If  P ( A ) = 0.65,   P ( B ) = 0.58, and   P ( A  and   B ) = 0.76, then  P ( A  or  B ) is: a. 1.23 b. 0.47 c. 0.18 d. 0.11 ANSWER: b 8. If you roll an unbiased  die 50 times, you should  expect an even number  to appear: a. at least twice in the 50 rolls b. on every other roll c. 25 out of the 50 rolls d. on the average, 25 out of the 50 rolls ANSWER: d 9. The collection of all possible outcomes of an experiment  is called:  a. a simple event b. a sample space c. a sample d. a population ANSWER: b 10. Which of the following  is not an approach  to assigning  probabilities? a. Classical approach b. Trial and  error approach c. Relative frequency approach d. Subjective approach ANSWER: b 11. A useful graphical method  of constructing  the sample space for an experiment  is: a. a tree diagram
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Probability 73 b. a pie chart c. a histogram d. an ogive ANSWER: a 12. A sample  space of an experiment  consists of the following  outcomes: 1, 2, 3, 4, 5. Which   of the following  is a simple event?   a. at least 3 b. at most 2 c. 3 d. 15 ANSWER:   c 13. Suppose  P ( A ) = 0.35.  The probability of complement  of A is: a. 0.35 b. 0.50 c. 0.65 d. -0.35 ANSWER: c 14. Assume  that  you  invested  $10,000 in  each  of three  stocks.  Each  stock  can  increase  in   value,   decrease   in   value,   or   remain   the   same.   Drawing   a   probability   tree   for   this  
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This document was uploaded on 10/25/2011 for the course LAPS 2320 at York University.

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Ch06 - CHAPTER6 PROBABILITY Inthefollowing please circlethe...

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