The average lifetime of smoke detectors that a company manufactures is 5 years, or 60 months, and

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The average lifetime of smoke detectors that a company manufactures is 5 years, or 60 months, and the standard deviation is 8 months. Find the probability that a random sample of 30 smoke detectors will have a mean lifetime between 58 and 63 months.

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Elementary Statistics A Step By Step Approach

ISBN: 9781259755330

10th Edition

Authors: Allan G. Bluman

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Question Posted: Sep 06, 2018 10:32 AM

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The average lifetime of smoke detectors that a company manufactures is 5 years, or 60 months, and

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Elementary Statistics A Step By Step Approach

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