import mir.test: shouldApprox;

0.50.fCDF(1, 1).shouldApprox == 0.3918266;
0.75.fCDF(1, 2).shouldApprox == 0.522233;
0.25.fCDF(0.5, 4).shouldApprox == 0.5183719;
0.10.fCDF(2, 1).shouldApprox == 0.08712907;