The marketing manager of a large ski resort wants to advertise that his ski resort has the shortest lift lines of any resort in the area. To avoid the possibility of a false advertising liability suit, he collects data on the times skiers wait in line at his resort and at each of two competing resorts on each of 14 days.

a. Can he conclude that there are differences in waiting times between the three resorts?

b. What are the required conditions for these techniques?

c. How would you check to determine that the required conditions are satisfied?