Regression diagnostics: investigate points outside Cook's distance contours before trusting results
mdancho84 · x · 2026-09-20
- Another segment from Matt Dancho's regression diagnostics series covering influential observations: some data points exert outsized pull on the model, and high-leverage observations with large residuals can silently distort coefficients.
- Practical rule: check whether points fall inside Cook's distance contours; investigate any point sitting outside them before trusting your results.
Related event: Data Scientist Shares Practical Regression Diagnostics Tips(2 posts)→
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