The results of a national survey showed that on average adults sleep 6.9 hours per night. Suppose

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The results of a national survey showed that on average adults sleep 6.9 hours per night. Suppose that the standard deviation is 1.2 hours and that the number of hours of sleep follows a bell-shaped distribution.

a. Use the empirical rule to calculate the percentage of individuals who sleep between 4.5 and 9.3 hours per day.

b. What is the z-score for an adult who sleeps 8 hours per night?

c. What is the z-score for an adult who sleeps 6 hours per night?

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Business Analytics

ISBN: 9780357902219

5th Edition

Authors: Jeffrey D. Camm, James J. Cochran, Michael J. Fry, Jeffrey W. Ohlmann

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Question Posted: Apr 27, 2024 09:00 AM

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The results of a national survey showed that on average adults sleep 6.9 hours per night. Suppose

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Business Analytics

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