Binom-Poisson Exercises - Students

Binom-Poisson Exercises - Students - c. exactly nine claims...

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ECO 6416 - Dr. Dickie - Exercise - Binomial and Poisson Distributions Problems 1. Twenty-five percent of the employees of a large company are members of minorities. A random sample of 7 employees is selected. a. What is the probability that the sample contains exactly 4 members of minorities? 2. An insurance company has determined that each day an average of nine claims are filed in their Atlanta branch. The head of the claims processing unit must staff her unit according to the expected work load. Two staff members have asked to be off tomorrow. If the boss grants their requests, her unit will be able to process five claims at most. What is the probability that during the next day a. exactly five claims will be filed? b. exactly seven claims will be filed?
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Unformatted text preview: c. exactly nine claims will be filed? 3. Shoppers enter Hamilton Place Mall at an average of 120 per hour. a. Define the random variable in words for this experiment. b. What is the probability that exactly 5 shoppers will enter the mall between noon and 1:00 p.m.? c. What is the probability that exactly 5 shoppers will enter the mall between noon and 12:05 p.m.? 4. The records of a department store show that 20% of its customers who make a purchase return the merchandise in order to exchange it. In the next six purchases, a. what is the probability that three customers will return the merchandise for exchange? b. what is the probability that none of the customers will return the merchandise for exchange?...
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