A plastics company makes thousands of plastic bottles for another company that manufactures saline solution for users

Question:

A plastics company makes thousands of plastic bottles for another company that manufactures saline solution for users of soft contact lenses. The plastics company randomly inspects a sample of its bottles as part of its quality-control program. Inspectors look for blemishes on the bottle, size and thickness, ability to close, leaks, labeling problems, and so on. Shown here are the results of tests completed on 25 bottles. Use these data to construct a c chart.