Many drivers of cars that can run on regular gas actually buy premium in the bellef that they will get better gas mileage. To test that bellef, we use 10 cars from a company fleet in which all the cars run on regular gas. Each car is filled first with either regular or premium gasoline, decided by a coin toss, and the mileage for that tankful is recorded. Then the mileage is recorded again for the same cars for a tankful of the other kind of gasoline. We don't let the drivers know about this experiment. Car # 1 2 3 4 5 6- 7 8 9 10 Regular 16 20 21 22 23 22 27 25 27 28 Premium 19 Difference 22 24 24 25 25 26 26 28 32 Test an appropriate hypothesis and state your conclusions.