What is a decision tree?
A3. A decision tree is a flow chart or diagram representing a classification system or predictive model. The tree is structured as a sequence of simple questions, and the answers to these questions trace a path down the tree. The end point reached determines the classification or prediction made by the model, which can be a qualitative judgment (e.g., these are responders) or a numerical forecast (e.g., sales will increase 15 percent).
