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The Wellington County OPP monitors accidents a the intersection of Highway 6 and County Road 7. Accidents numbers for the past 5 months have been

The Wellington County OPP monitors accidents a the intersection of Highway 6 and County Road 7. Accidents numbers for the past 5 months have been 3, 2, 5, 1, and 4. Create the appropriate three-sigma control chart. If there were seven accidents this month would you come to the conclusion that something has changed at the intersection? Why?

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