Problem 1: 1 Determine the trial central line and control limits for p chart using the following data, which are related to the process of dental insurance claims. Use Excel to plot the p chart and determine if the process is stable. If there are any out-of-control points, determine the revised central line and control limits. Subgroup Number Number Subgroup Number Number Number Inspected Nonconforming Number Inspected Nonconforming 300 3 14 300 6 2 300 6 15 300 7 3 300 4 16 300 4 300 17 300 5 300 20 18 300 7 6 300 2 19 300 7 300 6 20 300 0 300 7 21 300 2 9 300 3 22 300 3 10 300 0 23 300 6 11 300 24 300 12 300 25 300 8 13 300 5 4 6 5 8 6 9