I am a third year student studying Electronics Engineering. Over trial and Error, reading and repetation, I finally understand what Variance is and why we use it. We want to find just how much are sample values differ from some mean value. I can intuitively explain it, tell you ways that it’s useful and all that good stuff.
Corellation and Regression don’t make sense. I see their equations a lot. I can spout out the formulae given a few seconds to remember which is which. But for the life of me, I can’t explain too much about it apart from saying “regression to the mean” and “two values are highly correlated”.
ELI5 what the underlying logic is, what the equation is doing and all that jazz