A _____ classifies a categorical outcome variable by splitting observations into groups via a sequence of hierarchical rules.
a. regression tree b. scatter chart
c. classification tree d. classification confusion matrix
Question 2
The strength of a cluster can be measured by comparing the average distance in a cluster to the distance between cluster centroids. One rule of thumb is that the ratio for between-cluster distance to within-cluster distance should exceed what value for useful clusters?
a. 0.5
b. 1
c. 1.5
d. 2