Sample Exam 2

Sample Exam 2 - SAMPLE EXAM 2 PART 1 The probability...

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SAMPLE EXAM 2 PART 1 The probability distribution for the number of miles driven to campus each day for off-campus students is provided below. Use the distribution provided below to answer questions (1 – 3): X = #miles P(X) 1 0.10 2 0.25 3 0.40 4 0.20 5 0.05 1. What is the probability that a randomly selected students will drive at least 3 miles? a. 0.65 b. 0.25 c. 0.90 d. 0.40 e. none of the above 2. What is the expected number of miles driven each day by off-campus students? a. 2.00 b. 2.85 c. 3.05 d. 1.75 e. none of the above 3. What is the standard deviation of the number of miles driven each day by off-campus students? a. 2.850 b. 1.028 c. 1.014 d. 2.384 e. none of the above
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4. Which of the following statements is true? a. In a Bernoulli process, the probability of success in a given trial depends upon whether or not a success had occurred in the previous trial. b. The shape of a binomial distribution will never be symmetric for small number of n trials. c. If the probability of a success in a Bernoulli process is 0.30, and there are 20 trials, the expected number of successes would be 15.0 d. None of the above statements are true. e. All of the above statements are true. 5. Consider a small number of n trials. For which of the following values of π would the resulting binomial distribution be positively skewed? a. π = 0.70 b. Both π = 0.50 and π = 0.20 c. π = 0.50 d. π = 0.20 e. none of the above A city law-enforcement official has stated that 20% of items sold by
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This note was uploaded on 05/06/2008 for the course ISDS 2000 taught by Professor Nunnery during the Spring '08 term at LSU.

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Sample Exam 2 - SAMPLE EXAM 2 PART 1 The probability...

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