Exploring “Linear” in Linear Regression
Linear regression is one of those things you learn early, use forever, and never quite slow down to inspect. So here’s a slow inspection — three questions that look obvious until you actually try to answer them. The first two are warm-ups. The…
Read MoreThe curious case of R-Squared: Keep Guessing
Most explanations of R-squared start with a formula: Then they say something like “the proportion of variance explained by the model” and move on. And you nod, and you write it down, and somewhere in the back of your head a small voice says:…
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