U.S. companies lose billion 63.2 per year from workers with insomnia. According to 2013 a article in The Wall Street Journal, 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 5 10 7 7 8 8 5 9 6 7 7 9 6 8 8 9 5 10 7 a. What is the mean number of hours of sleep for this sample (to decimals)? b. What is the variance? Standard deviation (to decimals)? Variance Standard deviation
U.S. companies lose billion 63.2 per year from workers with insomnia. According to 2013 a article in The Wall Street Journal, 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 5 10 7 7 8 8 5 9 6 7 7 9 6 8 8 9 5 10 7 a. What is the mean number of hours of sleep for this sample (to decimals)? b. What is the variance? Standard deviation (to decimals)? Variance Standard deviation
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 10PPS
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U.S. companies lose billion 63.2 per year from workers with insomnia. According to 2013 a article in The Wall Street Journal, 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 | 5 | 10 | 7 | 7 | 8 | 8 | 5 | 9 | 6 |
7 | 7 | 9 | 6 | 8 | 8 | 9 | 5 | 10 | 7 |
a. What is the
b. What is the variance? Standard deviation (to decimals)?
Variance | |
Standard deviation |
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