Question 1:

To investigate the youth use of the Internet, a sample of 6 adults was asked to report the number of hours they spent on the Internet during the last month. The results are listed below:

52, 87, 60, 49, 42, 61

The researchers claim that the number of hours the adults spent on the Internet exceeds 56

hours per month.

a.Find the point estimator of the mean () for the number of hours the adults spent on the Internet per month.

b.Construct the 90% confidence interval for. Report the final answer