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Exam Stat 1204 ibsu basic THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: A company hires management trainees for entry level sales positions. Past experience indicates that only 10% will still be employed at the end of 9 months. Assume the company recently hired 6 trainees. 1) What is the probability that three of the trainees will still be employed at the end of 9 months? A) 0.0415 B) 0.0446 C) 0.0146 D) 0.0012 2) What is the probability that at least two of the trainees will still be employed at the end of 9 months? A) 0.9841 B) 0.0159 C) 0.1143 D) 0.0984 THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: A basketball player makes 80 percent of his free throws during ...view middle of the document...

2 3 4 5 6 7 # of claims P(x) 0.11 0.16 0.27 0.23 0.13 0.10 9) What is the average number of claims processed? A) 4.67 B) 4.81 10) What is the variance of the number of claims processed? A) 3.6211 B) 1.9029 11) Which of the following is true? A) P(X ≤ 4) = 0.27 B) P(X ≥ 6) = 0.10 1

C) 4.41 C) 1.4428 C) P(X > 4) = 0.46

D) 4.23 D) 2.0819 D) P(X > 2) = 1.00

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: The following table displays the joint probability distribution of X and Y.

12) Find and interpret the conditional probability function of X, given Y = 1. 13) Are X and Y statistically independent? Explain. THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: You have recently joined a country club. The number of times you expect to play golf in a month is represented by a random variable with a mean of 10 and a standard deviation of 2.2. Assume you pay monthly membership fees of $500 per month and pay an additional $50 per round of golf. 14) What is your average monthly bill from the country club? A) $900 B) $800 C) $1000 D) $700 15) What is the standard deviation for your average monthly bill from the country club? A) $324 B) $110 C) $220 D) $180

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: The amount of time you have to wait at a particular stoplight is uniformly distributed between zero and two minutes. 16) What is the probability that you have to wait more than 30 seconds for the stoplight? A) 0.25 B) 0.75 C) 0.50 D) 1.01 17) What is the probability that you have to wait between 15 and 45 seconds for the stoplight? A) 0.45 B) 0.25 C) 0.15 D) 0.35 18) Eighty percent of the time, the stoplight will change before you have to wait X seconds, What is the value of X? A) 24 seconds B) 96 seconds C) 30 seconds D) 90 seconds THE NEXT QUESTIONS ARE BASED ON...

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