Martin Motors has in stock three cars of the same make and model. The ...

     Martin Motors has in stock three cars of the same make   and model. The president would like to compare the gas consumption of the   three cars (labeled car A, car B, and car C) using four different types 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 shows the   number of miles driven in each trial. Using the .05 level of significance: a.   Is there a difference among types of gasoline? b. Is there a difference in   the cars? 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        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