When Data Science Makes Us Sad: The Story of an Overbooked Flight
on social media about a passenger bumped from an airplane because of overbooking. If you’re a frequent flyer, you may come across a similar situation. If you’re unlucky enough, it…
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Why Your Betas Explode: The Hidden Geometry of Multicollinearity
a marketing mix model to a senior director. The slide showed two beta coefficients side by side: Linear TV at +2.4, Digital TV at +1.8. He nodded, satisfied. Then he…
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Inside the Subspace Where Spurious Correlations Are Born
between cholesterol and blood pressure is measured in 10 patients. The observed correlation is 0.62. Is this enough evidence that a relationship exists? Studies that measure 20,000 gene expression levels…
