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How fast can male college students run a mile There s lots of variation of...

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How fast can male college students run a mile There s lots of variation of course During World War II physical training was required for male students in many colleges as preparation for military service That provided an opportunity to collect data on physical performance on a large scale A study of 12 000 able bodied male students at the University of Illinois found that their times for the mile run were approximately Normal with mean 7 02 minutes and standard deviation 0 7 minute It s good practice to draw a Normal curve on which this mean and standard deviation are correctly located To do this draw an unlabeled Normal curve locate the points where the curvature changes this is 1 standard deviation from the mean then add number labels on the horizontal axis Use the Empirical Rule to answer the following questions a What range of times covers the middle 95 of this distribution minutes Round to 1 decimal place b What percent of these runners run the mile between 6 32 and 8 42 minutes Round to 1 decimal place c What percentage of the these running times are faster than 9 12 minutes Round to 1 decimal place From to

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