EX2A3700.F98 - MSCI 3700 EXAM 2-A Fall, 1998 Name _...

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MSCI 3700 EXAM 2-A Name _______________________ Fall, 1998 Problems 1 - 5 use the following information. A mail-order firm keeps track of the orders it receives from three geographical regions, East, West, and North. For each region, the number of customers ordering size small, size medium, and size large was observed. The data are shown below. SIZE REGION Small (S) Medium (M) Large (L) TOTAL East (E) 100 160 140 400 West (W) 60 140 150 350 North (N) 90 100 60 250 TOTAL 250 400 350 1000 One of the orders is selected at random. 1. What is the probability that the order is from the West region? This is P(W). a. .06 b. .25 c. .35 d. .45 e. .30 2. What is P(W or S)? This represents the chances that the selected order is from the West region or is for the small size. a. .06 b. .45 c. .54 d. .60 e. .72 3. What is P(E│S)? a. .10 b. .40 c. .35 d. .25 e. .20 4. Are events M and E independent? a. Yes, since P(M and E) is zero. b. Yes, since P(M│E) is the same as P(M). c. Yes, since P(M│E) is the same as P(E). d. No, since P(M│E) is not the same as P(M). e. No, since P(M and E) is not zero.
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5. Are events M and E mutually exclusive? a. Yes, since P(M and E) is zero. b. Yes, since P(M│E) is the same as P(M). c. Yes, since P(M│E) is the same as P(E). d. No, since P(M│E) is not the same as P(M). e. No, since P(M and E) is not
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EX2A3700.F98 - MSCI 3700 EXAM 2-A Fall, 1998 Name _...

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