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Table 2 Recorded silhouette indexes

From: Augmented intelligence in educational data mining

Algorithm

2 clusters

3 clusters

4 clusters

7 clusters

8 clusters

Group A: NN-T (points unadjusted)

0.53

0.40

0.42

0.31

0.31

Group A: NN-T (points adjusted)

0.62

0.62

0.46

0.36

0.33

Group B: k-means

0.62

0.46

0.37

0.11

0.20

RapidMiner k-means

0.21

0.23

0.17

0.19

0.25

RapidMiner hierarchical clustering

0.008

0.37

0.39

0.45

0.45