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Question: samples of a cast aluminum part are classified on the...

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Samples of a cast aluminum part are classified on the basis of surface finish (in microinches) and length measurements. The results of 144 parts are summarized as follows: Length Excellent Good Excellent 71 8 Good Surface Finish 4 61 Let A denote the event that a sample has excellent surface finish, and let B denote the event that a sample has excellent length Determine the following probabilities. Round your answers to four decimal places (e.g. 98.7654) P(A) = P(B)- Are events A and B independent?

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