Question 3

Adapt the code shown for the null_model above to compute and show the test error for the full_model and save it as rmse_full_model.

RMSE - Null Model

128.4

RMSE - Full Model

120.59

Which of these two models is more flexible? Say how you would gauge model flexibility in this example and explain how you identified the more flexible model.

Which of these two models offers greater predictive performance? Say how you would gauge predictive performance in this example and explain how you identified the better-performing model.

Does a more flexible model always offer better predictive performance? Justify your answer.

Answer 3