Chapter 11.5, Problem 6E

To determine

To explain:

Reason that the way you are confident for average of all U.S teenagers is exactly $3$ hours per night.

Answer to Problem 6E

Not at all confident for average of all U.S teenagers is exactly $3$ hours per night for the reason described as below.

Explanation of Solution

Not at all confident, as although the population mean will be close to $3$ hours, the probability of it being exactly $3$ hours is so small.