To monitor the production of sheet metal screws by a machine in a large manufacturing company, a sample of 100 screws is examined each hour for three shifts of 8 hours each. Each screw is inspected...

To monitor the production of sheet metal screws by a machine in a large manufacturing company, a sample of 100 screws is examined each hour for three shifts of 8 hours each. Each screw is inspected and designated as conforming or nonconforming according to specifications. Management is willing to accept a proportion of nonconforming screws of 0.05. Use the following result of one day’s sampling (Table 2.13) to construct a control chart. Does the process seem to be in control? Explain.