Patrick and Greg answer a mailbag question about some foundational principles of regression and correlation, specifically the differences among correlation, standardized regression weights, semi-partial correlations, and partial correlations. They also check in with someone from Season 2: Amanda Montoya's undergrad mentee, Kat. Along the way, they also mention: Ap Olo Gies, mocking by text, particle transporters, walk like an Egyptian, spicing up parties, getting Curraned, your plus one, visuals in an audio format, great faces for podcasting, George Clooney, Beaker, and fool me once. 

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