G01EC_T1W_F C++ Header Example Program Results Lower tail significance levels and derivatives x df p dp/dx dp/ddf 8.2600e+00 2.0000e+01 9.9969e-03 7.7468e-03 -4.8985e-03 6.2000e+00 7.5000e+00 4.2793e-01 1.1434e-01 -1.0850e-01 5.5760e+01 4.5000e+01 8.6943e-01 1.9389e-02 -2.1701e-02