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Exercise

Calculating root entropy

This exercise continues with the loan default example from the slides. The image shows the root node of a decision tree split by color. In these next three exercises, you will calculate the entropy of the root node, calculate the entropy of the child nodes, and determine the information gain that color provides for determining loan default status.

In this exercise, the task is to calculate the entropy of the root node in this decision tree.

decison tree split by color

Instructions

100 XP
  • Calculate the class probabilities of "yes" and "no" classes in the root node for defaulting on a loan.
  • Use the class probabilities to calculate the entropy of the root node.