Using the data shown below, develop a three-sigma C-chart. Use that C-chart to work the problems that follow.
Day 1 2 3 4 5 6 7 8 9 10 11 12
Number of issues 1 1 15 3 2 3 1 12 16 2 1 2
What is the lower control limit?
What is the Center Line?
What is the Upper Control Limit?
