Refer to the FTC study of the pricing accuracy of supermarket electronic scanners, Exercise 4.30 (p. 192).

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Refer to the FTC study of the pricing accuracy of supermarket electronic scanners, Exercise 4.30

(p. 192).

Recall that the probability that a scanned item is priced incorrectly is y3,, = .033. 1

a. Suppose 10,000 supermarket items are scanned.

What is the approximate probability that you observe at least 100 items with incorrect prices?

b. Suppose 100 items are scanned and you are interested in the probability that fewer than five are incorrectly priced. Explain why the approximate method of part a may not yield an accurate estimate of the probability.

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Statistics For Business And Economics

ISBN: 9780130272935

8th Edition

Authors: James T. McClave, Terry Sincich, P. George Benson

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