Question 5 (3 points)

We are performing k-fold cross-validation on a dataset with 100,000 rows.

I have set aside 16,000 rows into a holdout set. I am going to perform cross-validation with the remaining

rows not in the holdout set. I have decided to set k to 7.

How many rows would each of the 7 folds have? (1 Point)

In each iteration of cross-validation, how many rows would the training set have and how many rows

would the validation set have? (1 point)

How does k-fold cross validation help ridge regression prevent overfitting? (1 point)

(Answer Box)