The lengths of lumber a machine cuts are normally distributed, with a mean of 96 inches and

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The lengths of lumber a machine cuts are normally distributed, with a mean of 96 inches and a standard deviation of 0.5 inch.

(a) What is the probability that a randomly selected board cut by the machine has a length greater than 96.25 inches?

(b) You randomly select 40 boards. What is the probability that their mean length is greater than 96.25 inches?

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Elementary Statistics Picturing The World

ISBN: 9780321911216

6th Edition

Authors: Ron Larson, Betsy Farber

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Question Posted: Nov 24, 2015 07:45 AM

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The lengths of lumber a machine cuts are normally distributed, with a mean of 96 inches and

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a 96 05 z x 9625 96 05 05 P x 9625 P z 05 1 P z 05 1 06915 ...View the full answer

Elementary Statistics Picturing The World

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