+ Ch 6: Homework - Statistical Quality Control Question 6 of 8 - 71 iii View Policies Current Attempt in Progress University Hospital has been concerned with the number of errors found in its billing statements to patients. An audit of 100 bills per week over the past 12 weeks revealed the following number of errors: Week Number of Errors 6 1 2 8 3 5 4 5 1 6 4 7 8 8 5 7 9 10 8 11 11 12 4 (b) Develop control charts with z = 3: (If the lower control limit is negative, round the LCL to zero and all other answers to 2 decimal places, e.g. 15.25.) CL UCL LCL (c) The parts of this question must be completed in order. This part will be available when you complete the part above