Q. Having built a decision tree, we are using reduced error pruning to reduce the size of the
tree. We select a node to collapse. For this particular node, on the left branch, there are 3
training data points with the following outputs: 5, 7, 9.6 and for the right branch, there are
four training data points with the following outputs: 8.7, 9.8, 10.5, 11. What were the original
responses for data points along the two branches (left & right respectively) and what is the
new response after collapsing the node?