| Class | Description | 
|---|---|
| ClusterEvaluator<T extends Clusterable> | Base class for cluster evaluation methods. | 
| SumOfClusterVariances<T extends Clusterable> | Computes the sum of intra-cluster distance variances according to the formula:
 \] score = \sum\limits_{i=1}^n \sigma_i^2 \]
 where n is the number of clusters and \( \sigma_i^2 \) is the variance of
 intra-cluster distances of cluster \( c_i \). | 
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