Automobile manufacturer wants to estimate the mean gasoline

Reference no: EM13240939

An automobile manufacturer wants to estimate the mean gasoline mileage that its customers will obtain with its new compact model. How many sample runs must be performed in order that the estimate be accurate to within 0.25 mpg at 90% confidence? (Assume that Ïƒ = 2.0.)

Reference no: EM13240939

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