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Calculate the upper control limit for a c-chart

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Reference no: EM132358011

Green Cab Co. has "How am I driving?" stickers on all of its cabs with a toll-free number for people to call about the performance of their drivers. Over a 9-day period they received the following numbers of calls from irate passengers.

Day 1 2 3 4 5 6 7 8 9

# Calls received 3 0 8 9 6 7 4 9 8

Calculate the upper control limit for a c-chart from this data using three sigma control limits. Enter your answer to two decimal places.

Reference no: EM132358011

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