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Define - To test whether there is a difference in mean gas consumption.

Martin Motors has in store three cars of the same make and model. The president would like to relate the gas consumption of the three cars (labelled car A, car B, and car C) using four different kinds of gasoline. For each trial a gallon of gasoline was added to an empty tank and the car was driven until it ran out of gas. The following table displays the number of miles driven in each trial.

Distance (miles)

Types of Gasoline Car A Car B Car C

Regular 22.4 20.8 21.5

Super regular 17.0 19.4 20.7

Unleaded 19.2 20.2 21.2

Premium unleaded 20.3 18.6 20.4

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