The bitter, eight-month baseball strike that ended the 1994 season so abruptly w

Question

The bitter, eight-month baseball strike that ended the 1994 season so abruptly was expected to have sub- stantial repercussions at the box office when the 1995 season finally got under way. It did. By the end of the first week of play, American League teams were playing to 12.8% fewer fans than the year before; National League teams fared even worse—their attendance was down 15.1%

Your friend wants to do a two-sample t-test to test if there is a difference between the two leagues. You object to the test on the grounds that

I think it's A, but I wanna make sure!

AMERICAN NATIONAL Baltimore -2 Atlanta -49 Boston 16 Chicago -4 California 7 Cincinnati -18 Chicago -27 Colorado -27 Detroit -22 Florida -15 Kansas City -20 Houston -16 Milwaukee -30 Los Angeles -10 Minnesota -8 Montreal -1 New York -2 New York 34 Seattle -3 Philadelphia -9 Texas -39 Pittsburgh -28 Toronto -24 San Diego -10 San Francisco -45 St. Louis -14

Explanation / Answer

The correct option is A.The data is not a random sample, you have all the individuals in the relevant populations.

One of the most important conditions to perform a two-sample t-test to test if there is a difference between the two samples, is that both the samples should be a simple random sample.

The above criterion has not met, so failed to perform a two samples t test.

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