public void ValidateInverseCumulativeDistribution(double mu, double lambda, double probability, double f) { var n = new InverseGaussian(mu, lambda); AssertHelpers.AlmostEqualRelative(f, InverseGaussian.ICDF(mu, lambda, probability), precision); AssertHelpers.AlmostEqualRelative(f, n.InvCDF(probability), precision); }