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I need DETAIL calculation step by step please The local Chamber of Commerce would like to estimate the average price of 93 octane gasoline for

I need DETAIL calculation step by step please

The local Chamber of Commerce would like to estimate the average price of 93 octane gasoline for Chester

County. There are currently 86 gas stations operating in the county. A random sample of 15 stations had an

average price of $4.20 per gallon and a standard deviation of $0.24 per gallon. Determine the 95% confidence

interval for the average price per gallon of 93 octane gasoline in Chester County.

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