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6.24 Total sleep time of college students. In Example 5.4 (page 293), the total sleep time per night among college students was approximately Normally distributed with mean = 6.78 hours and standard deviation o = 1.24 hours. You initially plan to take an SRS of size n = 175 and compute the average total sleep time. (a) What is the standard deviation for the average time in hours? in minutes? (b) Use the 95 part of the 68-95-99.7 rule to describe the variability of this sample mean.

6.24 Total sleep time of college students. In Example 5.4 (page 293), the total sleep time per night among college students was approximately Normally distributed with mean = 6.78 hours and standard deviation o = 1.24 hours. You initially plan to take an SRS of size n = 175 and compute the average total sleep time. (a) What is the standard deviation for the average time in hours? in minutes? (b) Use the 95 part of the 68-95-99.7 rule to describe the variability of this sample mean.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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**Total Sleep Time of College Students** In Example 5.4 (page 293), the total sleep time per night among college students was approximately normally distributed with a mean \(\mu = 6.78\) hours and a standard deviation \(\sigma = 1.24\) hours. You initially plan to take a simple random sample (SRS) of size \(n = 175\) and compute the average total sleep time. **(a)** What is the standard deviation for the average time in hours? In minutes? **(b)** Use the 95 part of the 68–95–99.7 rule to describe the variability of this sample mean.
Transcribed Image Text:**Total Sleep Time of College Students** In Example 5.4 (page 293), the total sleep time per night among college students was approximately normally distributed with a mean \(\mu = 6.78\) hours and a standard deviation \(\sigma = 1.24\) hours. You initially plan to take a simple random sample (SRS) of size \(n = 175\) and compute the average total sleep time. **(a)** What is the standard deviation for the average time in hours? In minutes? **(b)** Use the 95 part of the 68–95–99.7 rule to describe the variability of this sample mean.
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