Accord.Tests.Statistics.TDistributionTest.ConstructorTest C# (CSharp) Method

        public void ConstructorTest()
        {
            var t = new TDistribution(degreesOfFreedom: 4.2);

            double mean = t.Mean;     // 0.0
            double median = t.Median; // 0.0
            double var = t.Variance;  // 1.9090909090909089
            double mode = t.Mode;

            double cdf = t.DistributionFunction(x: 1.4); // 0.88456136730659074
            double pdf = t.ProbabilityDensityFunction(x: 1.4); // 0.13894002185341031
            double lpdf = t.LogProbabilityDensityFunction(x: 1.4); // -1.9737129364307417

            double ccdf = t.ComplementaryDistributionFunction(x: 1.4); // 0.11543863269340926
            double icdf = t.InverseDistributionFunction(p: cdf); // 1.4000000000000012

            double hf = t.HazardFunction(x: 1.4); // 1.2035833984833988
            double chf = t.CumulativeHazardFunction(x: 1.4); // 2.1590162088918525

            string str = t.ToString(CultureInfo.InvariantCulture); // T(x; df = 4.2)

            Assert.AreEqual(0.0, mean);
            Assert.AreEqual(0.0, median);
            Assert.AreEqual(0.0, mode);
            Assert.AreEqual(1.9090909090909089, var);
            Assert.AreEqual(2.1590162088918525, chf);
            Assert.AreEqual(0.88456136730659074, cdf);
            Assert.AreEqual(0.13894002185341031, pdf);
            Assert.AreEqual(-1.9737129364307417, lpdf);
            Assert.AreEqual(1.2035833984833988, hf);
            Assert.AreEqual(0.11543863269340926, ccdf);
            Assert.AreEqual(1.4000000000000012, icdf);
            Assert.AreEqual("T(x; df = 4.2)", str);

            var range1 = t.GetRange(0.95);
            var range2 = t.GetRange(0.99);
            var range3 = t.GetRange(0.01);

            Assert.AreEqual(-2.1030107450099362, range1.Min);
            Assert.AreEqual(2.1030107450099362, range1.Max);
            Assert.AreEqual(-3.6502571302187774, range2.Min);
            Assert.AreEqual(3.6502571302187774, range2.Max);
            Assert.AreEqual(-3.6502571302187792, range3.Min);
            Assert.AreEqual(3.6502571302187774, range3.Max);
        }