A mail-order clothing retailer is interested in improving the accuracy of its customer service agents who enter customer orders into the firm's computerized record system. To monitor the accuracy of the agents' data entry activities, a manager records the number of data entry errors detected in 150 randomly selected customer orders placed over the course of 1 month (i.e., 30 days). These data are stored in the file P20_27.xlsx. Construct a p chart for the given sample data.

a. Based on the given sample data, is this data entry process currently in control? Provide support for your conclusion here.

b. What advice, if any, would you give to the managers of this process?