Question: 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=?

Please help me solve, thank you in advance :)

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