How to learn machine learning

So just download biology basis stats (to know how to compare means - this gives you the A/B test superpower), then psychology factor analysis (to know PCA - this gives you the dimension reduction superpower) then econometrics basic regression (to know linear regression)

With these 3 superpowers, you will be able to do more than most of the "machine learning" people. When you have mastered that, try stuff like random forest, and see if you still think it's as cool as it's hyped to be.

https://news.ycombinator.com/item?id=21924298

Excel CheatSheet

Count words - =IF(LEN(TRIM(A2))=0,0,LEN(TRIM(A2))-LEN(SUBSTITUTE(A2," ",""))+1)