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Old 07-10-17, 01:27 PM
mathking mathking is offline
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Join Date: 07-25-10
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I looked at the girls who ran under 24:00 in 2016. This gave me a mean improvement of 10.6 seconds with a standard deviation of almost 1:08. That goes along with the fact that of the 1880 girls with 2016 times under 24:00 about 45% got slower from 2015 to 2016 in terms of their PRs.
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