Decision tree regression is a machine learning technique . To predict the output y for an input vector X, the tree structure encodes a set of if-then rules such as, "If the value of X at index [2] is ...

For example, a decision tree regression model prediction might be, "If employee age is greater than 43.0 and age is less than or equal to 51.5 and years-experience is less than or equal to 20.0 and ...