Câu 21: A00-240: SAS Statistical Business Analysis Using SAS 9: Regression and Modeling

While building a predictive model, median imputations are performed while preparing the training data. How should the imputations be addressed in the validation data?

1. A. The imputed values are irrelevant to the validation data, and are not used.
2. B. The imputed values must be applied directly to the validation data without recalculation.
3. C. The imputed values must be recalculated using the validation data. — đáp án hiện tại
4. D. The imputed values must be recalculated using both the training and the validation data.