Dear Forum,

I am conducting a cluster analysis with six binary criteria

Code:
    cluster wardslinkage criteria1 criteria2 criteria3 criteria4 criteria5 criteria6, measure(L2) name(CLUSTER1)
Now I would like to examine the number of clusters I should use.
I am conducting the Duda Hart stopping rule and the Calinski-Harabasz stopping rule but I a receiving different results.
The Duda Hart stopping rule (Je(2)/Je(1)) indicates 4 clusters. The pseudo T squared is the lowest at 13 clusters...

The Calinski-Harabasz pseudo F always increases and is the highest at 15 clusters


How should I interpret the results?