The two kinds of variation every swimmer should know about

The two kinds of variation every swimmer should know about

‘When you have two data points, it is very likely that one will be different from the other.’

W Edwards Deming

Random variation affects everyone in everything we do.  Take two work days, and the length of our commute will vary by a few minutes.  Count calories, and it’s highly unlikely that we’ll consume exactly the same number on two different days.  Swim 1500m at two triathlons, and your time will not be the same.

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