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[FAQ Bot] NEW: Homework Q4: Logistic regression validation AUC is worse than the single - #490

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✨ FAQ NEW

Course: machine-learning-zoomcamp
Section: module-4-homework (It belongs to the classification homework workflow and evaluation (ROC AUC, cross-validation/C selection, logistic regression). The closest available section for these concepts is module-4-homework.)
Related Issue: #489

Question

Homework Q4: Logistic regression validation AUC is worse than the single feature lead_score—is the model broken?

Decision Rationale

This is a specific troubleshooting question about why logistic regression validation AUC drops when using unscaled numeric features and varying C. None of the existing FAQs shown cover feature scaling effects on regularized logistic regression for this homework setup.

Placement Details

  • Section ID: module-4-homework
  • Sort Order: End of section
  • Filename Slug: ml-hw4-logreg-c-auc-drop-unscaled-features

⚠️ Warnings

  • Section choice based on available homework/evaluation coverage; topic is logistic regression + ROC AUC + C selection.

🤖 Generated by FAQ Bot

Closes #489

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[FAQ] Homework 4 (2026) Q2/Q6: Why does my model's AUC (0.732) lose to lead_score alone, and why does C=0.001 beat C=1?

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