The length of Major League Baseball games is approximately normally distributed and averages 2 hours and 50.1 minutes, with a standard deviation of 21.0 minutes. It has been claimed that New York Yankees baseball games last, on the average, longer than the games of the other Major League teams. To test the truth of this statement, a sample of eight Yankees games was randomly identified and the €œtime of game€ (in minutes) for each obtained:

At the 0.05 level of significance, do these data show sufficient evidence to conclude that the mean time of Yankees baseball games is longer than that of other Major League baseball teams?

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