The mean life expectancy for a healthy American is 78 years with a standard deviation of 5

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The mean life expectancy for a healthy American is 78 years with a standard deviation of 5 years. Assuming that the distribution is bell-shaped, to what age can about 95% of all Americans expect to live? Provide an upper and lower bound.

a) 77 and 79

b) 63 and 93

c) -4 and 4

d) 68 and 88

Related Book For answer-question

Essentials of Statistics for the Behavioral Sciences

ISBN: 978-1285056340

8th Edition

Authors: Frederick J Gravetter, Larry B. Wallnau

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Posted Date: Jan 07, 2021 12:20 AM

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The mean life expectancy for a healthy American is 78 years with a standard deviation of 5

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Essentials of Statistics for the Behavioral Sciences

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