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December 13th, 2017, 07:45 AM   #1
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Percentage value

Guys see this 2 1/2 %. Does anyone know where it's coming from?

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December 13th, 2017, 02:19 PM   #2
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The distribution of plug diameters is approximately normal which means 95% will be within 2 standard deviations of the mean. The tails total 5%, split up equally between diameters which are too large and those which are too small (2.5% each).
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