Test TwoA- answers copy

Test TwoA- answers copy - MANA 028 Test Two - Fall, 2007...

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Name_____________________________________________ Test Two - Fall, 2007 Each response is worth 2 points unless otherwise indicated. Round probabilities to 4 decimals. 1. Of the last 500 customers entering a supermarket, 50 have purchased a wireless phone. If the classical 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 the above. 2. If two events are collectively exhaustive, what is the probability that one or the other occurs? a. 0.25 b. 0.50 c. 1.00 d. Cannot be determined from the information given. 3. If two events are mutually exclusive, what is the probability that one or the other occurs? a. 0.25 b. 0.50 c. 1.00 d. Cannot be determined from the information given. 4. 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 5. If the outcome of event A is not affected by event B , then events A and B are said to be a. mutually exclusive b. independent c. collectively exhaustive d. None of the above. 6. 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 7. If P ( A ) = 0.20, P ( B ) = 0.30 and P ( A and B ) = 0.06, then A and B are: a. dependent events b. independent events c. mutually exclusive events d. complementary events 8. Which of the following are required conditions for the distribution of a discrete random variable X that can assume values i x ? a.
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Test TwoA- answers copy - MANA 028 Test Two - Fall, 2007...

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