Accord.Tests.Statistics.ToolsTest.PooledVarianceTest C# (CSharp) Method

        public void PooledVarianceTest()
        {
            double[][] samples = 
            {
                new double[] { 31, 30, 29 },
                new double[] { 42, 41, 40, 39 },
                new double[] { 31, 28 },
                new double[] { 23, 22, 21, 19, 18 },
                new double[] { 21, 20, 19, 18,17 },
            };

            double expected = 2.7642857142857147;
            double actual = Measures.PooledVariance(samples);
            Assert.AreEqual(expected, actual);
        }