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Question: a large certified public accounting firm has been monitoring the...

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A large certified public accounting firm has been monitoring the accuracy of its employees and wishes to get the number of accounts with errors under statistical control. It has sampled 100 accounts for each of the last 30 days and has examined them for errors, with the results shown in the accompanying data. Complete parts a through c below. Click the icon to view the counts for accounts with errors. a. Construct a p-chart for the account process. Choose the correct graph below. O A. O B. 6 9 1215 18 21 24 27 30 Sample Account 3 6 9 12 15 18 21 24 27 30 Sample Account 0.2 O D. 0.0 6 9 12 15 18 21 24 27 30 3 6 9 12 15 18 21 24 27 30 Sample Account Sample Account b. What does the chart indicate about the statistical stability of the process? The process appears to be control. There outside the control limits and there ▼ | in the data.c. Suppose that for the next 3 days, sample sizes of 100 accounts are examined, and 8, 9, and 10 errors, respectively are discovered on those days. Plot the appropriate data on the control chart. Choose the correct graph below. OA. о в. 0.04 0 3 6 9 12 15 1821 24 27 30 33 Sample Acount 0 3 6 9 1215 18 21 24 27 30 33 Sample Account ос. 0.0 O D. 0.04 0.04 0 3 6 9 12151821 2427 30 33ビ 0 3 6 9 12 15 1821 24 27 30 33 Sample Account Sample Atcount Indicate whether any of the control chart signals are present. Choose the correct answer below 0 A. The process still appears to be in statistical control. There are no new potential concerns. O B· The process still appears to be in statistical control, but there is a potential or concern ifthe next sample proportions continue to trend upward, resulting in a sustained upward trend. O C. The process is still out of control. O D. The process still appears to be in statistical control, but there is a potential for concern if the next sample proportions continue to trend upward, as they are very close to the upper control limit.Sample Errors 14 10 5 6 12 10 13 12 13 14 15 16 17 18 19 20 10 6 10

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