RQ3: Is TestI a better code change predictor than RandomI?

TestI outperforms RandomI for predicting changes in controllers and MVC slices

Wilcoxon Signed-Rank test applied to precision and recall measures of ITest and IRandom

Hypothesis pvalue r TestI-NF precision = RandomI-NF precision 1.0e-72 0.838 TestI-NF recall = RandomI-NF recall 2.7e-43 0.641 TestI-CF precision = RandomI-CF precision 5.2e-54 0.719 TestI-CF recall = RandomI-CF recall 1.0e-01 0.076