Aproduct research organization recently published its findings of the results of mileage tests of several brands of tires. Five tires of each brand were tested and the mileage results of two of the brands were as follows:

Subsequent to the publication of the tests the manufacturers of these two brands of tires each claimed in their advertising that "on the average," its tires held up better than the other brand. Comment on the use of the term average by the tire makers. Which average does each have in mind?

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Mileage Brand A 26,800 22,300 27,400 24,000 23,500 Brand B 25,600 23,400 21,000 26,000 25,000