Mathematics
Mathematics, 25.08.2021 05:00, misslux

The manager of the customer service department of Data Tech Credit Card Service Company is concerned about the number of defects produced by the billing process. Every day a random sample of statements was inspected for errors regarding incorrect entries involving account​ numbers, transactions on the​ customer's account, interest​ charges, and penalty charges. Any statement with one or more of these errors was considered a defect. The study lasted 30 days and yielded the data in the table​ below: LOADING... Samples Number of Errors in Sample of 110 1120 2130 a. Construct a​ p-chart for the billing process. Set up the​ p-chart by specifying its control limits and center line.​ (Enter your responses rounded to four decimal places. If your answer for is​ negative, enter this value as​ 0.) . 0610 . 0292 0 b. Is there any nonrandom behavior in the billing process that would require management​ attention? A. ​Yes, and management would like to repeat whatever was done when samples were taken and to avoid what was done during samples . B. Yessamples have an upward run and samples have a downward run. C. Since of the data points are within the control limits​ then, by​ definition, there is not any nonrandom behavior in the billing process. D. There are not enough samples to determine whether there is any nonrandom behavior in the billing process.

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