MATH 456 Quiz 12

Given on 2026-05-07

1. In every split of a tree, there are (supposed to be) three simultaneous minimizations. Name two.

2. Are trees considered linear or non-linear models? Why?

3. To fit a simple linear relationship with a (regression) tree, the complexity of the tree (the number of leaves) might need to be relatively large. Why is this the case?

4. Name one novel development that XGBoost brought to the world?

5. Name one novel development that LightGBM brought to the world?

6. What is the main reason the LightGBM authors claim that LightGBM is bettern than XGboost?