In-class Assignment: Statistical Process Control Part C 1. The data processing department of the Arizona Bank has five data entry clerks. Each working day their supervisor verifies the accuracy of a random sample of 250 records. A record containing one or more errors is considered defective and must be redone. The results of the last five samples are shown in the table. All were checked to make sure that none was out of control. Sample number Number of Defective Records CON 1 2 3 10 14 6 4 5 11 9 (a) Based on these historical data, compute the upper control limit and the lower control limit of a p-chart. (b) Samples for the next 4 days showed the following: Sample Number of Defective Records Tues 17 Wed 15 Thurs 22 Fri 21 Is the process in control or out of control