def lfprob (dfnum, dfden, F):
    p = betai(0.5*dfden, 0.5*dfnum, dfden/float(dfden+dfnum*F))
    return p
Returns the (1-tailed) significance level (p-value) of an F
dataset/ETHPy150Open radlab/sparrow/src/main/python/third_party/stats.py/lfprob