Many drivers of cars that can run on regular gas actually buy premium in the bel

Question

Many drivers of cars that can run on regular gas actually buy premium in the belief that they will get better gas mileage. To test that belief, 10 cars in a company fleet were used. All the cars run on regular gas. Each car was filled first with either regular or premium gasoline, decided by a coin toss. The mileage for that tank of gas was recorded. Then the car was filled with the other type of gasoline and the mileage for that tank of gas was recorded. The difference in gas mileage between the two ypes o gasoline premium regular for the 10 cars was recorded. A 95% confidence interval was constructed using the pai e t me ho s: 5 mp hi h of following is the cormect interpretation of this confidence interval? Choose the correct answer below A. O B C. The average car gets between 0.5 and 3.5 miles more on a gallon of premium gas than regular gas 95% of the time. We are 95% confident hat average increase in gas mileage when using regular rather than premium gas s between We are 95% confident that average increase in gas mileage when using premium rather than regular gas is between 0.5 and 3.5 miles per gallon. and 35 miles pe gallon. 0 D. We are 95% sure cars running on premium gas will get between 0.5 and 3.5 miles per gallon more than cars running on regular gas. E. 5 and 3.5 miles as of the ca un ing on e We are 95% sure that 95% of the cars running on pre average um gas get between r alon more ha larga on

Explanation / Answer

here option C is correct

we are 95% confident that the average increase in gas mileage when using premium rather than regular gas is between 0.5 and 3.5 miles per gallon

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