Computers in some vehicles calculate various quantities related to performance.

Question

Computers in some vehicles calculate various quantities related to performance. One of these is the fuel efficiency, or gas mileage, usually expressed as miles per gallon (mpg). For one vehicle equipped in this way, the mpg were recorded each time the gas tank was filled, and the computer was then reset. In addition to the computer calculating mpg, the driver also recorded the mpg by dividing the miles driven by the amount of gallons at fill-up. The driver wants to determine if these calculations are different. Here are the mpg values for a random sample of 20 of these records: The appropriate hypotheses are, H_0: no difference in calculated mean mpgs. H_a: The two calculated mean mpgs are different. H_0: no difference in calculated mean mpgs. H_a: The computer-calculated mean mpg is higher. H_0: The mean calculated mpgs are different. H_a: no difference in mean calculated mpgs. H_0: no difference in calculated mean mpgs. H_a: The driver-calculated mean mpg is higher.

Explanation / Answer

Here we are testing the claim that these mpg calculations are different.

Hence,

Option A is correct,

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