Mathematics, 06.03.2020 17:48 Weser17

Fifteen SmartCars were randomly selected and the highway mileage of each was noted The analysis yielded a mean of 47 miles per gallon and a sample standard deviation of 5 miles per gallon Which of the following would represent a 90% confidence interval for the average highway mileage of all SmartCars? A. 47 plusminus (1.753(5 + 3.8730) B. 47 plusminus (1.345(5 + 3.8730) C. 47 plusminus (1.765(5 + 3.8730) D. 47 plusminus (1.645(5 + 3.8730)

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Fifteen SmartCars were randomly selected and the highway mileage of each was noted The analysis yiel...