U.S. companies lose $63.2 billion per year from workers with insomnia. Workers lose an average of 7.8 days of productivity per year due to lack of sleep. The following data show the number of hours of sleep attained during a recent night for a sample of 20 workers.76126710116126118117119127129(a)What is the mean number of hours of sleep for this sample? h(b)What is the variance? Standard deviation (in h)? (Round your answers to two decimal places.)variancestandard deviation h

Mean and variance and standard deviation is calculated in excel below

Answered: U.S. companies lose $63.2 billion per…

Essentials of Business Analytics (MindTap Course List)

2nd Edition

ISBN:9781305627734

Author:Jeffrey D. Camm, James J. Cochran, Michael J. Fry, Jeffrey W. Ohlmann, David R. Anderson

Publisher:Jeffrey D. Camm, James J. Cochran, Michael J. Fry, Jeffrey W. Ohlmann, David R. Anderson

Chapter2: Descriptive Statistics

Section: Chapter Questions

Problem 18P: The average time that Americans commute to work is 27.7 minutes (Sterlings Best Places, April 13,...

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U.S. companies lose $63.2 billion per year from workers with insomnia. Workers lose an average of 7.8 days of productivity per year due to lack of sleep. The following data show the number of hours of sleep attained during a recent night for a sample of 20 workers.

7	6	12	6	7	10	11	6	12	6
11	8	11	7	11	9	12	7	12	9

(a)

What is the mean number of hours of sleep for this sample?

(b)

What is the variance? Standard deviation (in h)? (Round your answers to two decimal places.)

variancestandard deviation h

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