#### Chapter 6 exercises

2 (a, b), 3, 4, 6, **challenge**: 5

#### Applied

Using the `glmnet`

package, construct a ridge regression and LASSO model to predict violent crime in the training data set. A description for how to use this package can be found in your book on page 251 and 255.

- How many variables were selected by the LASSO?
- What are the training MSEs for ridge and LASSO using the optimal value of \(\lambda\)?
- If the MSEs differed, why do you think one is higher than the other in this setting?