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An elementary school class ran 1 mile in an average of 11

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An elementary school class ran 1 mile in an average of 11 minutes with a standard deviation of 3 minutes. Rachel, a student in the class, ran 1 mile in 8 minutes. A junior high school class ran 1 mile in an average of 9 minutes, with a standard deviation of 2 minutes. Kenji, a student in the class, ran 1 mile in 8.5 minutes. A high school class ran 1 mile in an average of 7 minutes with a standard deviation of 4 minutes. Nedda, a student in the class, ran 1 mile in 8 minutes.

(a) Why is Kenji considered a better runner than Nedda, even though Nedda ran faster than he?

(b) Who is the fastest runner with respect to his or her class? Explain why?

Reference no: EM13578724

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