In non- hierarchical clustering, plotting the ratio of total within- group variance to between- group variance against the number of clusters is useful if you are .
A) deciding on the number of clusters
B) interpreting and profiling the clusters
C) assessing the validity of clustering
D) both B and C

Question

Quizplus · Accepted Answer

Plotting the ratio of total within-group variance to between-group variance against the number of clusters helps in determining the optimal number of clusters by identifying the point where adding more clusters does not significantly improve the variance ratio, often referred to as the "elbow method."

In Non- Hierarchical Clustering, Plotting the Ratio of Total Within-