Author Question: _____ is a measure of the heterogeneity of observations in a classification tree. a. Sensitivity b. ... (Read 122 times)

soccerdreamer_17 · **on:** Jun 24, 2018

_____ is a measure of the heterogeneity of observations in a classification tree.
a. Sensitivity b. Specificity
c. Accuracy d. Impurity

Question 2

In k-means clustering, k represents the
a. number of variables.
b. number of clusters.
c. number of observations in a cluster.
d. mean of the cluster.

Liamb2179 · **Reply #1 on:** Jun 24, 2018

Answer to Question 1

d
RATIONALE: Impurity is a measure of the heterogeneity of observations in a classification tree.

Answer to Question 2

b
RATIONALE: In -means clustering, k represents the number of clusters.