The medical insurance claim data in Table 7E.1 assumes that each day 50 claims were examined. Suppose that the number of examined claims was actually as follows (the number of claims is given in order): 350, 356, 275, 100, 135, 260, 400, 425, 200, 310, 550, 450, 120, 600, 255, 390, 600, 350, 725, 475.

1. Construct a standard control chart for fraction nonconforming using the variable sample size approach. Interpret the chart.

2. Construct a control chart for fraction nonconforming using the average sample size approach. Interpret the chart.

3. Construct a standardized control chart for fraction nonconforming. Interpret the chart.

4. Construct the Laney modification of the fraction nonconforming control chart. Interpret the chart. 5. Which approach would you recommend for ongoing monitoring of this process? Explain your answer.