Create the appropriate three-sigma control chart

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Reference no: EM132112021

a) A regional airline is concerned about its record of on-time performance. The Memphis hub experiences 40 flight operations each day of the week, with the record of on-time departures for the previous 10 days: 37, 36,38, 39, 36, 35, 40, 37, 38 and 36. Prepare a p chart with average on-time departure percentage. The next day they had 34 on time flights. Is this within acceptable limits?

b) Police give speeding tickets to 24 drivers per month from its customers due to on a particular stretch of road. What type of control chart would you use to monitor this process? Create the appropriate three-sigma control chart. If they gave out thirty-seven ticktests in a subsequent month (with a similar level of enforcement effort) would there be reason to believe that more people are speeding on that road? Why?

Reference no: EM132112021

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