The standard deviation was 12 minutes using chebysheffs


2,542 runners who took part in a 10km race had an average time of 1 hr and 11 minutes. The standard deviation was 12 minutes. Using Chebysheff's theorem, determine at least how many runners had a running time between 53 minutes and 89 minutes?

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Basic Statistics: The standard deviation was 12 minutes using chebysheffs
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