You’ve just bought a new car that claims to get a highway fuel efficiency rating of 31 miles per gallon. If you had to guess, would you expect the standard deviation of gas mileage attained by all cars like yours to be 30 mpg, 3 mpg, or 0.3 mpg? 1. 3 mpg since that takes into account various driving conditions. 2. 30 mpg since most cars would be included in that range. 3. 0.3 mpg since that means that the fuel efficiency is consistent. 4. 30 mpg since that is closed to the highway fuel efficiency rating for the car.

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