public void ProbabilityDensityFunctionTest()
{
MultivariateContinuousDistribution target = CreateMultivariateContinuousDistribution();
double[] x = { 0.4, 2 };
double expected = 0.032309150392899;
double actual = target.ProbabilityDensityFunction(x);
Assert.AreEqual(expected, actual, 1e-10);
}