public static Test suite() {
        TestSuite suite = new TestSuite("org.jfree.data.statistics");
        suite.addTestSuite(BoxAndWhiskerCalculatorTests.class);
        suite.addTestSuite(BoxAndWhiskerItemTests.class);
        suite.addTestSuite(DefaultBoxAndWhiskerCategoryDatasetTests.class);
        suite.addTestSuite(DefaultBoxAndWhiskerXYDatasetTests.class);
        suite.addTestSuite(DefaultStatisticalCategoryDatasetTests.class);
        suite.addTestSuite(HistogramBinTests.class);
        suite.addTestSuite(HistogramDatasetTests.class);
        suite.addTestSuite(MeanAndStandardDeviationTests.class);
        suite.addTestSuite(RegressionTests.class);
        suite.addTestSuite(SimpleHistogramBinTests.class);
        suite.addTestSuite(SimpleHistogramDatasetTests.class);
        suite.addTestSuite(StatisticsTests.class);
        return suite;