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Question: A distributor receives a new shipment of 20 iPods. He draws a random sample of five iPods and thoroughly inspects the click wheel of each of them. Suppose that the shipment contains three iPods with a malfunctioning click wheel. Let X denote the number of iPods with a defective click wheel in the sample of five.

(a) The random variable X is (choose one)

(i) binomial

(ii) hypergeometric

(iii) negative binomial

(iv) Poisson.

(b) Give the sample space and the formula for the PMF of X.

(d) Find the expected value and variance of X.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92577842

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