public void DistributionFunctionTest()
{
FDistribution f = new FDistribution(2, 3);
Assert.AreEqual(f.DegreesOfFreedom1, 2);
Assert.AreEqual(f.DegreesOfFreedom2, 3);
double expected = 0.350480947161671;
double actual = f.DistributionFunction(0.5);
Assert.AreEqual(expected, actual, 1e-6);
}