Suppose that a category of world-class runners are known to run a marathon (26 miles) in an

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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 14 minutes. Consider 49 of the races. Let X̅ the average of the 49 races.

a. X̅ ~ _____(_____,_____)

b. Find the probability that the runner will average between 142 and 146 minutes in these 49 marathons.

c. Find the 80th percentile for the average of these 49 marathons.

d. Find the median of the average running times.

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Introductory Business Statistics

ISBN: 202318

1st Edition

Authors: Alexander Holmes , Barbara Illowsky , Susan Dean

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Question Posted: May 10, 2024 02:01 PM

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Suppose that a category of world-class runners are known to run a marathon (26 miles) in an

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Introductory Business Statistics

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