Big Al's Steak House and Trail's End both claim to have the shortest wait times in
town. To check out the claims, Ramon, a restaurant reviewer, records the time it
takes to be seated without reservations. The results of wait times for 8 visits to each
restaurant are shown in the table.

Big AI's Steak House Wait Times (minutes): 5,13,22,7,20,21,20,12

Trail's End Wait Times (minutes): 11,19,14,14,15,20,10,17

a. Describe the populations and samples for this problem.
b. Calculate the mean wait time for each of the two restaurants.