The weights of pears in an orchard are normally distributed with mean .32 pound and standard deviation

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The weights of pears in an orchard are normally distributed with mean .32 pound and standard deviation .08 pound.
(a) If one pear is selected at random, what is the probability that its weight is between .28 and .34 pound?
(b) If  denotes the average weight of a random sample of four pears, what is the probability that X is between .28 and .34 pound?
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Statistics Principles And Methods

ISBN: 9780470904114

7th Edition

Authors: Richard A. Johnson, Gouri K. Bhattacharyya

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