Suppose that a category of world class runners are known

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Reference no: EM13630195

Suppose that a category of world class runners are known to run a marathon (26 miles) in an average of 145 minutes with a standard deviation of 16 minutes. Consider 49 of the races. Let X-bar = the average of the 49 races.

Given that X-bar ~ N (145, 2.29), find the 80th percentile for the average of these 49 marathons.

Reference no: EM13630195

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