A company that makes basketballs has themotto: “Our basketballs are ready to play.” Therefore, it
is important to the company that the basketballs are inflated
with the proper amount of air when shipped. Most
basketballs are inflated to 7 to 9 pounds per square inch.
Recently the company selected a random basketball from
its production line at four different time periods over its
normal production day. The results were recorded.