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

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The Answer of 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

The Strength of a Cluster Can Be Measured by Comparing