EDIT

ref #8771 phpunit improving test suite setup

ref #8771 phpunit logging in junit xml format - renaming logfile

ref #8771 phpunit logging in junit xml format

ref #8771 unit test for significant figures of statistical values

fixing PHPUnit setup for php 7 and documenting its usage with PHPStorm

fix #8771 removing comment

fix #8771 display of average value with minimum amount of significant figures

ref #8786 renaming all min_max_() functions to statistical_values_()

ref #8739 updated explanatory text for statistical values

ref #8786 improved display of min, max, mean and other statistical values