(PECL stats >= 1.0.0)
stats_rand_gen_f — Generates a random deviate from the F distribution
Generates a random deviate from the F (variance ratio) distribution with "dfn" degrees of freedom in the numerator and "dfd" degrees of freedom in the denominator. Method : directly generates ratio of chisquare variates.
dfnThe degrees of freedom in the numerator
dfdThe degrees of freedom in the denominator
A random deviate