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Red Top Cab Company receives multiple complaints per day about driver behavior. Over 9 days the owner recorded the number of calls to be​ 3, 0,​ 8, 9,​ 6, 7,​ 4, 9, and 8. What is the upper control limit for the​ 3-sigma ​c-​chart?

User Tom Tu
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Answer:

The answer to this question is 13.35.

User Pkolodziej
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