A shipment of 5000 printed circuit boards contains 40 that are defective. Two boards will be chosen

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A shipment of 5000 printed circuit boards contains 40 that are defective. Two boards will be chosen at random, without replacement. Consider the two events E1 = event that the first board selected is defective and E2 = event that the second board selected is defective.

a. Are E1 and E2 dependent events? Explain in words.

b. Let not E1 be the event that the first board selected is not defective (the event E1c). What is P(not E1)?

c. How do the two probabilities P(E2|E1) and P(E2|not E1) compare?

d. Based on your answer to Part (c), would it be reasonable to view E1 and E2 as approximately independent?

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Related Book For  book-img-for-question

Introduction To Statistics And Data Analysis

ISBN: 9780495118732

3rd Edition

Authors: Roxy Peck, Chris Olsen, Jay L. Devore

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