Câu 10: E20-007: Data Science and Big Data Analytics

Under which circumstance do you need to implement N-fold cross-validation after creating a regression model?

1. A. There is not enough data to create a test set. — đáp án hiện tại
2. B. The data is unformatted.
3. C. There are missing values in the data.
4. D. There are categorical variables in the model.