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Exercises for QUIZ 2.docx

# Exercises for QUIZ 2.docx - Exercises for QUIZ#2 1 A study...

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Exercises for QUIZ #2 1. A study by Peter D. Hart Research Associates for the Nasdaq Stock Market revealed that 43% of all American adults are stockholders. In addition, the study determined that 75% of all American adult stockholders have some college education. Suppose 37% of all American adults have some college education. An American adult is randomly selected. a. What is the probability that the adult does not own stock? (Earl) b. What is the probability that the adult owns stock and has some college education? (Paoline) c. What is the probability that the adult owns stock or has some college education? (Clarissa) d. What is the probability that the adult has neither some college education nor owns stock? (Jashlee) e. What is the probability that the adult does not own stock or has no college education? (Venice) 2. Determine the mean, the variance, and the standard deviation of the following discrete distribution. (Kyle) x P(x) 1 0.238 2 0.29 3 0.177 4 0.158 5 0.137 3. Shown here are the possible numbers of Pepsi drinkers in a sample of six people and the probability of that number of Pepsi drinkers occurring in the sample. Use the data to

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• Spring '14

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