F distribution

The probability density function for the F distribution is:

.. math::

f(x, df_1, df_2) = \frac{df_2^{df_2/2} df_1^{df_1/2} x^{df_1 / 2-1}}
                            {(df_2+df_1 x)^{(df_1+df_2)/2}
                             B(df_1/2, df_2/2)}

where :math:x > 0.

The following plots show the pdf:

.. image:: ../../../../tests/imgs/stats/continuous/f/fpdf.png :align: center :width: 480