Question: Calculate the upper control limit for a c-chart if there 150 total defects found in 20 daily samples. Be sure to use 3-sigma control limits

Calculate the upper control limit for a c-chart if there 150 total defects found in 20 daily samples. Be sure to use 3-sigma control limits (Hint: the z-score is 3)

Group of answer choices

A. 7.5

B. 2.739

C. 15.72

D. 20

E. 30

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