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Unformatted text preview: Exam 2 - Fall 2005 - ST 370 Online/Distance - A Circle the answer. All questions are worth 5 points. 1. NCSU has three games left on the football schedule, Boston College, Middle Tennessee State, and Maryland. Suppose that the probability of winning over Boston College is .40, over Middle Tennessee State is .90, and over Maryland is .60. Moreover, suppose the outcomes are independent. What is the probability that NCSU wins all three games? (to 2 decimal places) A. .36 B. .22 C. .54 D. .94 E. None of the above. 2. A three-sided die (with faces labeled 1, 2, and 3) is thrown twice. Let X be the product of the two outcomes. What is the probability that X 4? A. 3/9 B. 4/9 C. 5/9 D. 6/9 E. None of the above. 3. What is the probability that a standard normal random Variable Z lies between- 1 . 23 and 2.13? (to 2 decimal places) A. .97 B. .78 C. .67 D. .87 E. None of the above. 4. Suppose that car accident fatalities occur at the rate of 3 per day in North Carolina. What is the probability of three or more fatalities in a two day period? (to 2 decimal places) A. .94 B. .09 C. .10 D. .40 E. None of the above. 1 5. A golfer has an average score of 80 with a standard deviation of 4. Assume that her scores are approximately normally distributed. What is the probability that she will score 83 or more on her next golf outing? (to 3 decimal places) A. .002 B. .048 C. .227 D. .337 E. None of the above....
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This note was uploaded on 01/16/2012 for the course ST 370 taught by Professor Nail during the Spring '08 term at N.C. State.
- Spring '08