1_Chap5Stats

1_Chap5Stats - Review Assessment Test Chapter 5 User...

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Review Assessment: Test Chapter 5 User Elizabeth S Knowles Submitted 2/20/08 8:02 AM Name Test Chapter 5 Status Completed Score 60 out of 80 points Time Elapsed 1 hours, 31 minutes, and 14 seconds out of 3 hours and 0 minutes allowed. Instructions Question 1 2 out of 2 points Assume that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability p of success on a single trial. n = 6, x = 3, p = Selected Answer: 0.0536 Correct Answer: 0.0536 Question 2 2 out of 2 points Solve the problem. Suppose you pay $3.00 to roll a fair die with the understanding that you will get back $5.00 for rolling a 3 or a 6, nothing otherwise. What is your expected value? Selected Answer: -$1.33 Correct Answer: -$1.33 Question 3 0 out of 2 points Solve the problem. Find the variance for the given probability distribution. Selected Answer: 7.43 Correct Answer: 2.46
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Question 4 2 out of 2 points Answer the question. Assume that there is a 0.15 probability that a basketball playoff series will last four games, a 0.30 probability that it will last five games, a 0.25 probability that it will last six games, and a 0.30 probability that it will last seven games. Is it unusual for a team to win a series in 5 games? Selected Answer: No Correct Answer: No Question 5 0 out of 2 points Solve the problem. On a multiple choice test with 11 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the standard deviation for the number of correct answers. Selected Answer: 1.342 Correct Answer: 1.436 Question 6 2 out of 2 points Determine whether the given procedure results in a binomial distribution. If not, state the reason why. Rolling a single "loaded" die 58 times, keeping track of the numbers that are rolled. Selected Answer: Not binomial: there are more than two outcomes for each trial. Correct Answer: Not binomial: there are more than two outcomes for each trial. Question 7 2 out of 2 points Solve the problem. A company manufactures batteries in batches of 28 and there is a 3% rate of defects. Find the standard deviation for the number of defects per batch. Selected Answer: 0.903 Correct Answer: 0.903 Question 8 2 out of 2 points Find the standard deviation, σ, for the binomial distribution which has the stated values of n and p. Round your answer to the nearest hundredth. n = 36; p = .2
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Selected Answer: σ = 2.40 Correct Answer: σ = 2.40 Question 9 2 out of 2 points Use the given values of n and p to find the minimum usual value μ - 2σ and the maximum usual value μ + 2σ. n = 1104, p = 0.93 Selected Answer: Minimum: 1009.76; maximum: 1043.68 Correct Answer: Minimum: 1009.76; maximum: 1043.68 Question 10 0 out of 2 points Identify the given random variable as being discrete or continuous. The cost of a randomly selected orange
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This note was uploaded on 05/27/2008 for the course MTH 157 taught by Professor Spence during the Spring '08 term at VCCS.

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1_Chap5Stats - Review Assessment Test Chapter 5 User...

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