High-Dimensional Text Clustering by Dimensionality Reduction and Improved Density Peak

Table 12

The results of the -test of DPC-K-means on NMI.

Dataset		Mean	Standard deviation			Difference
BBC		0.7141	0.2361	1.787	1.533	Yes
20-newsgroups	4 groups	0.7863	0.2687	1.581	1.533	Yes
	5 groups	0.7114	0.2069	1.413	1.533	No
	6 groups	0.6217	0.1794	1.875	1.533	Yes
	7 groups	0.5835	0.1369	2.029	1.533	Yes
	8 groups	0.5036	0.1699	2.399	1.533	Yes
Sports Article		0.1062	0.0869	2.078	1.533	Yes
Asian Religious		0.1475	0.1290	2.078	1.533	Yes
Stack Overflow		0.0308	0.0356	1.938	1.533	Yes
Amazon		0.0033	0.0051	1.440	1.533	No