Let’s talk linear regression. It’s the thing we learn about first year in psychology at Uni, and it blows all our minds that we are doing math in psychology. An unfortunate effect of all high school student counsellors in Norway thinking all psychologists do is shrink people’s heads. And then here we come to Uni and first semester they stick us with math. I’m no statistician, I’m no mathematician. So I’ll be honest with you all, I am not the one to answer your most indepth and deep questions about stats.