フリー問題

問題文

A tree model scores 99 percent on the records it was fitted on and 61 percent on records it has never seen. The data was split correctly before any preprocessing. Which condition does that gap point to?

選択肢

1. That gap is the signature of drift in the fitted model.
2. That gap is the signature of overfitting in the fitted model.
3. That gap is the signature of miscalibration in the fitted model.
4. That gap is the signature of imbalance in the fitted model.