Use the following information to answer question. It is believed that American League pitchers should have higher earned-run averages because of the designated hitter rule. A baseball analyst collected 10 pitchers’ earned-run averages from each of the 4 divisions in the major leagues and ranked them in the following table. (A smaller rank means a smaller earned-run average.)

Do a test to determine whether the American League pitchers have higher earned-run averages. Use 10 percent.

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National league East 1 2 6 16 24 33 West 3 40 7 13 20 34 American league East 4 39 9 21 27 37 West 5 38 18 22 28 35