Research Article
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 |
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