Good read, but pretty dense (or perhaps I&#x27;m just dense).<p>Personally, I get more practical value from <a href="http:&#x2F;&#x2F;elem.com&#x2F;~btilly&#x2F;effective-ab-testing&#x2F;" rel="nofollow">http:&#x2F;&#x2F;elem.com&#x2F;~btilly&#x2F;effective-ab-testing&#x2F;</a>.