Accord.Tests.Statistics.TTestPowerAnalysisTest.TTestPowerAnalysisConstructorTest3 C# (CSharp) Method

        public void TTestPowerAnalysisConstructorTest3()
        {
            // Examples from R's graphical manual
            // http://rgm2.lab.nig.ac.jp/RGM2/func.php?rd_id=pwr:pwr.t.test

            double actual, expected;

            {
                var target = new TTestPowerAnalysis(OneSampleHypothesis.ValueIsDifferentFromHypothesis)
                {
                    Effect = 0.2,
                    Samples = 60,
                    Size = 0.10,
                };

                target.ComputePower();

                expected = 0.4555818;
                actual = target.Power;
                Assert.AreEqual(expected, actual, 1e-5);
            }

            {
                var target = new TwoSampleTTestPowerAnalysis(TwoSampleHypothesis.ValuesAreDifferent)
                {
                    Effect = 2 / 2.8,
                    Samples1 = 30,
                    Samples2 = 30,
                };

                target.ComputePower();

                expected = 0.7764889;
                actual = target.Power;
                Assert.AreEqual(expected, actual, 1e-6);
            }

            {
                var target = new TwoSampleTTestPowerAnalysis(TwoSampleHypothesis.FirstValueIsGreaterThanSecond)
                {
                    Effect = 0.3,
                    Power = 0.75,
                };

                target.ComputeSamples();

                expected = 120.2232016;
                actual = target.Samples1;
                Assert.AreEqual(expected, actual, 1e-6);
                Assert.AreEqual(target.Samples1, target.Samples2);
            }
        }