A hospital manager receives a certain number of complaints each day about the hospitals service. Complaints for 15 days are given in the table shown. What are the control limits when one will construct a control chart using three sigma limits?             Days Number of Complaints 1 4 2 6 3 4 4 5 5 4 6 8 7 6 8 7 9 5 10 3 11 5 12 4 13 4 14 6 15 4

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Statistical Process Control

The use of statistical methods to observe and manage a process to make sure that it operates at its full potential and thus produce a confirming product is called Statistical Process Control.