To Test Whether the Cluster Results Offer a Reasonable Summary

Multiple Choice

To test whether the cluster results offer a reasonable summary of the similarity, correlation, or distance matrix, that is, are the individual clusters sufficiently homogeneous and is the system as a whole consistent with the input similarities, the following procedure(s) can be performed:

A) the variables used to determine the clusters can be tested to determine if the clusters have statistically different values across the groups.
B) the reliability of the estimates can be assessed by splitting the data into multiple subsets and assessing whether the same clusters are produced when the subsets are analyzed.
C) significance tests can be performed that compare the clusters on variables not used to generate the solution.
D) All of the above procedures are correct.
E) Both b and c are correct.