EMC Proven Professional – Data Science and Big Data Analytics — Question 10

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

Answer options

• A. There is not enough data to create a test set.
• B. The data is unformatted.
• C. There are missing values in the data.
• D. There are categorical variables in the model.

Correct answer: A

Explanation

N-fold cross-validation is particularly useful when the dataset is limited, making it challenging to set aside a distinct test subset. The other options, while potential issues in data preparation, do not specifically necessitate the application of N-fold cross-validation.