Telecom manufactures electronic components for computers. One measure it uses to monitor the quality of its distribution process is the number of customer invoice errors. The distribution center manager monitored the company€™s order processing and distribution by recording the number of invoice errors for 30 days. The sample results are as follows:

Construct a c-chart with 3σ limits for invoice errors and indicate if the process was out of control at any time.

Transcribed Image Text:

IF e or 6 9 201 8 8 7 3470224 Day 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 462513476518997 ay 1 2 3 5 6 7 8 9 0 1 2 3 4 5