According to a 2022  article from the Sleep Foundation, sleep deprivation of workers in the United States results in productivity losses of more than $136  billion per year. The following data show the number of hours of sleep attained during a recent night for a sample of 20 workers. Click on the datafile logo to reference the data.   The datafile logo.   6 5 10 5 6 9 9 5 9 5 8 7 8 6 9 8 9 6 10 8 a. What is the mean number of hours of sleep for this sample (to 1 decimal)? b. What is the variance? Standard deviation (to 2 decimals)? Variance   Standard deviation

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 4BGP
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According to a 2022  article from the Sleep Foundation, sleep deprivation of workers in the United States results in productivity losses of more than $136  billion per year. The following data show the number of hours of sleep attained during a recent night for a sample of 20 workers.

Click on the datafile logo to reference the data.

 

The datafile logo.

 

6 5 10 5 6 9 9 5 9 5
8 7 8 6 9 8 9 6 10 8

a. What is the mean number of hours of sleep for this sample (to 1 decimal)?

b. What is the variance? Standard deviation (to 2 decimals)?

Variance  
Standard deviation  
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