#interaction-features

Question 1: Single choice

The building type BldgType has a low mutual-information score with SalePrice. But when you plot SalePrice against living area separately for each building type, the trend lines have very different slopes. What should you conclude?

It interacts with living area, so keep it, e.g. as type × area features1
The low score shows BldgType carries no information, so it can be dropped2
The differing slopes show living area is unreliable and should be replaced by BldgType3
The MI score must be miscomputed, because a useful feature always has a high score4

#interaction-features

Timed test