A company that makes basketballs has the motto: Our basketballs are ready to play. Therefore, it is

A company that makes basketballs has the motto: €œOur 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. From a set of calibration data, the following statistics were measured:

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 and listed in the following table.

a)€‚Create an X chart based on the calibration data statistics for these 30 samples.
b)€‚Create an R chart based on the calibration data statistics for these 30 samples.
c)€‚Assuming that the process was in control during the calibration period, is the company€™s process for filling its basketball with the proper amount of air in control?

Transcribed Image Text:

X = 8.05 R 0.65 0 257117936598990 9 25089948671841 .4 6 0 8 7 9 0 8 7 4 8 0 2 36990508588669 0135180393 341731689 012345678901234567890