A New Metaheuristic-Based Hierarchical Clustering Algorithm for Software Modularization

Table 12

t-test for the experiments.

Case study	Descriptive statistics						Inferential statistics
	Mean		Standard deviation		Standard error between mean		Levene’s test		t-test		Wilcoxon-signed rank test
	G1	G2	G1	G2	G1	G2	F	Sig.	T	Sig.	Z	Sig.
Firefox-browser	1.4714	1.5572	0.337	0.246	0.1472	0.1003	1.5044	0.2550	0.4702	0.651	−0.73	0.465
Firefox-dom	0.573	0.614	0.247	0.306	0.1175	0.1370	0.035	0.8571	0.281	0.8135	−1.753	0.08
Firefox-accessible	0.5228	0.5942	0.1275	0.1285	0.5702	0.0574	0.013	0.9670	0.882	0.4036	−1.483	0.138
Firefox-extensions	0.553	0.636	0.212	0.2391	0.0.096	0.103	0.268	0.6109	0.527	0.530	−0.674	0.5
Firefox-gfx	0.3344	0.2688	0.1468	0.1254	0.06456	0.05611	0.054	0.823	0.760	0.469	−1.461	0.144
Firefox-ipc	1.306	1.462	0.4081	0.436	0.179	0.195	0.348	0.572	0.521	0.5617	−0.135	0.893
Firefox-intl	0.347	0.319	0.364	0.1272	0.1628	0.0422	3.847	0.085	0.465	0.654	−1.084	0.279
Mini-Tunis	0.9726	1.0157	0.14256	0.14043	0.06376	0.06280	0.0181	0.014	0.674	0.643	−0.135	0.893
JUnit 4	0.7950	0.7923	0.00759	0.01831	0.00339	0.00819	0.4701	0.2481	0.496	0.770	−1.069	0.285
Servlet-API	2.5234	2.5134	0.05345	0.5871	0.02390	0.02626	1.007	0.3277	0.690	0.785	−0.73	0.465
Easy mock	1.9572	2.0360	0.29716	0.24379	0.13289	0.10903	0.745	0.127	0.953	0.659	−0.405	0.686
Calculator	2.3094	2.3210	0.16658	0.29373	0.07449	0.13136	0.814	0.378	0.182	0.941	−0.405	0.686