S6.24 Telephone inquiries of 100 IRS customers are monitored daily at random. Incidents of incorrect information or other non-conformities ( as impoliteness to customers ) are recorded. The data for the last week follows : Day # of Non-comformities 1 2 3 4 5 5 10 23 20 15 Construct a 3 standard deviation c chart of non-conformities. What does the control chart tell you about the IRS telephone operators