Took Probability and Statistics a long ass time ago, and don't remember much at all.
Now I'm trying to analyze a bunch of data from split tests and do some multi-variate testing. Any suggestions on short guidelines or resources for stats refreshers?
For anyone wanting to build their own A/B testing func: Z-test - Wikipedia, the free encyclopedia is really the only piece of statistics you need to implement.
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Excuse my ignorance, but please explain how this works and what we can determine from it for those who were getting high behind the bike shed instead of going to maths?