Accuracy Lied to Me: Precision, Recall, ROC AUC and Cross-Validation in ML Zoomcamp Module 4
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In Module 3 I trained a lead-scoring classifier and reported 0.645 accuracy. It sounded fine. Module 4 of ML Zoomcamp exists to destroy exactly that feeling — accuracy hides everything interesting when classes are imbalanced. Here is what I actually learned, with the numbers from my homework notebo…
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- 2026-10-19 21:48 · DEV Community — AI
Accuracy Lied to Me: Precision, Recall, ROC AUC and Cross-Validation in ML Zoomcamp Module 4