Spoiler Alert: This post is going to discuss some simple math and stats. It’s going to use spreadsheets and charts. If you want to bail now, I understand. I hope you stay with it.
“Mean” in mathematics is “Average”. “Regression To The Mean” is a statistical process used to even out the data. It basically states that if a variable is extreme the first time you measure it, it will be closer to average the next time you measure it. In technical terms, it describes how a random variable outside the norm eventually tends to return to the norm.