The local Chamber of Commerce would like to estimate theaverage price of 93 octane gasoline for Chester County. There arecurrently 86 gas stations operating in the county. A random sampleof 15 stations had an average price of $4.20 per gallon and astandard deviation of $0.24 per gallon. Determine the 95%confidence interval for the average price per gallon of 93 octanegasoline in Chester County.