This is one of those counterintuitive of things about investing because increasing sample size decreases variance *above trivial sizes*.https://twitter.com/matthlerner/status/858252565213057024 …
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Replying to @patio11
Everyone remembers that from stats 101 but forgets that literally every sample size ever discussed by an investor is **tiny**.
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(And yeah if you take multiple measurements you'd expect the 200 samples as a group to have lower than the 20 samples as a group.)
8:05 AM - 29 Apr 2017
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