Refer to Exercise 1.a.?Determine the 95% confidence interval for the mean predicted when?x?=?7.b.?Determine the 95% prediction interval

Question:

Refer to Exercise 1.a.?Determine the 95% confidence interval for the mean predicted when?x?=?7.b.?Determine the 95% prediction interval for an individual predicted when?x?=?7.

Exercise 1.

The Sally Coffee Shop is considering closing one hour earlier in the evening through the week. Sally obtained the following data from a study taken last week of the number of customers between the hours of 10 and 11 p.m., and the dollar value spent.