Stratified train/test/val splits

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Task

📝 **Question:** Fraud rate is 1.5%. You do `train_test_split(X, y, test_size=0.2)` and test AUC is wildly noisy. Fix?

📋 Pick the right answer.

💡 **Hint:** Re-read the theory above if unsure.

Keep going

📊quiz

Cross-validation strategies

📊quiz

Loading a CSV

📊quiz

Selecting columns and rows

🤖predictFREE

Prerequisites — what you should know before this track

⚡predictFREE

Prerequisites — what you should know before this track

🎯 Quiz

Question

📝 **Question:** Fraud rate is 1.5%. You do `train_test_split(X, y, test_size=0.2)` and test AUC is wildly noisy. Fix?

📋 Pick the right answer.

💡 **Hint:** Re-read the theory above if unsure.

Keep going

💬 Discussion