public void LogProbabilityDensityFunctionTest()
{
LognormalDistribution target = new LognormalDistribution(1.7, 4.2);
double x = 2.2;
double expected = System.Math.Log(0.0421705870979553);
double actual = target.LogProbabilityDensityFunction(x);
Assert.AreEqual(expected, actual, 1e-15);
}