Question: 5. Praw a standardized control chart for proportion defectives for the following problem with variable sample sizes. Comment on the performance of the billing department.

5. Praw a standardized control chart for

5. Praw a standardized control chart for proportion defectives for the following problem with variable sample sizes. Comment on the performance of the billing department. Assuming out of control data are due to assignable causes, revise the chart and report on new control limits. Use graphs as appropriate. SE Bills with Sample number Sample size proportion defective corresponding to the sample size error UCL LCL Center line 400 400 400 400 400 400 300 300 300 300 300 300 300 300 500 500 500 500 500 500 500 500 500 500 500 6

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