public void ValidateInverseCumulativeDistribution(int shape, double invScale, double x, double cdf) { var gamma = new Gamma(shape, invScale); Assert.That(gamma.InverseCumulativeDistribution(cdf), Is.EqualTo(x).Within(10)); Assert.That(Gamma.InvCDF(shape, invScale, cdf), Is.EqualTo(x).Within(10)); }