This is an online appendix to the paper titled: "Empirical Evaluation of Software Maintainability Based on a Manually Validated Refactoring Dataset", submitted to the Information and Software Technology journal as an invited PROMISE 2016 conference paper.

The content of this package is:
* met-diff-csv: a folder containing the metric values before and after the manually analyzed version of the RefactoringDataSet (the data is produced using our online dataset available at http://openscience.us/repo/refactoring/refact_val.html), which we can use to calculate and analyze metric values and metric differences between the pre and post-refactoring versions.
* script: a folder containing an R script that was used to produce the statistical test results presented in the paper
* met-stat-Class-Refact_Sum.xlsx: an Excel file containing all the main results for class level analysis, Mann-Whitney U test p-values, Cliff's delta effect sizes, overview tables and diagrams
* met-stat-Method-Refact_Sum.xlsx: an Excel file containing all the main results for method level analysis, Mann-Whitney U test p-values, Cliff's delta effect sizes, overview tables and diagrams