An Internet server conducted a survey of 400 of its customers and found that the average amount of time spent online was 12.5 hours per week with a standard deviation of 5.4 hours.
What shape do you think the random variable x, the number of hours spent online, has?
______________
If the distribution of the original measurements is not normal, you can still use the standard normal distribution to construct a confidence interval for , the average online time for all users of this Internet server. Why?
________________________________________________________
Construct a 95% confidence interval for the average online time for all users of the particular Internet server.
______________
If the Internet server claimed that its users averaged 15 hours of use per week, would you agree or disagree?
______________
Explain.
________________________________________________________

Question

An Internet server conducted a survey of 400 of its customers and found that the average amount of time spent online was 12.5 hours per week with a standard deviation of 5.4 hours.
What shape do you think the random variable x, the number of hours spent online, has?
______________
If the distribution of the original measurements is not normal, you can still use the standard normal distribution to construct a confidence interval for  , the average online time for all users of this Internet server. Why?
________________________________________________________
Construct a 95% confidence interval for the average online time for all users of the particular Internet server.
______________
If the Internet server claimed that its users averaged 15 hours of use per week, would you agree or disagree?
______________
Explain.
________________________________________________________

Quizplus · Accepted Answer

The Answer of An Internet server conducted a survey of 400 of its customers and found that the average amount of time spent online was 12.5 hours per week with a standard deviation of 5.4 hours.
What shape do you think the random variable x, the number of hours spent online, has?
______________
If the distribution of the original measurements is not normal, you can still use the standard normal distribution to construct a confidence interval for  , the average online time for all users of this Internet server. Why?
________________________________________________________
Construct a 95% confidence interval for the average online time for all users of the particular Internet server.
______________
If the Internet server claimed that its users averaged 15 hours of use per week, would you agree or disagree?
______________
Explain.
________________________________________________________

An Internet Server Conducted a Survey of 400 of Its