Accord.Tests.Statistics.TwoSampleTTestTest.TTestConstructorTest C# (CSharp) Метод

        public void TTestConstructorTest()
        {
            // Example from http://en.wikipedia.org/wiki/Student%27s_t-test#Two-sample_T.C2.A02_test

            double[] sample1 = { 30.02, 29.99, 30.11, 29.97, 30.01, 29.99 };
            double[] sample2 = { 29.89, 29.93, 29.72, 29.98, 30.02, 29.98 };

            TwoSampleTTest test;

            // Unequal variances
            test = new TwoSampleTTest(sample1, sample2, assumeEqualVariances: false);

            Assert.AreEqual(0.0485, test.StandardError, 1e-4);
            Assert.AreEqual(0.095, test.ObservedDifference, 1e-10);
            Assert.AreEqual(7.03, test.DegreesOfFreedom, 1e-3);

            Assert.AreEqual(0.091, test.PValue, 0.001);

            test = new TwoSampleTTest(sample1, sample2, assumeEqualVariances: false,
                alternate: TwoSampleHypothesis.FirstValueIsGreaterThanSecond);

            Assert.AreEqual(0.0485, test.StandardError, 1e-4);
            Assert.AreEqual(0.095, test.ObservedDifference, 1e-10);
            Assert.AreEqual(7.03, test.DegreesOfFreedom, 1e-3);

            Assert.AreEqual(0.045, test.PValue, 0.001);

            // Equal variances
            test = new TwoSampleTTest(sample1, sample2, assumeEqualVariances: true);

            Assert.AreEqual(0.0485, test.StandardError, 1e-4);
            Assert.AreEqual(0.095, test.ObservedDifference, 1e-10);
            Assert.AreEqual(10, test.DegreesOfFreedom);

            Assert.AreEqual(0.078, test.PValue, 0.001);

            test = new TwoSampleTTest(sample1, sample2, assumeEqualVariances: true,
                alternate: TwoSampleHypothesis.FirstValueIsGreaterThanSecond);

            Assert.AreEqual(0.0485, test.StandardError, 1e-4);
            Assert.AreEqual(0.095, test.ObservedDifference, 1e-10);
            Assert.AreEqual(10, test.DegreesOfFreedom);

            Assert.AreEqual(0.038, test.PValue, 0.0015);
        }