(PECL stats >= 1.0.0)
stats_cdf_t — Calculates any one parameter of the T distribution given values for the others.
Diese Funktion ist bis jetzt nicht dokumentiert. Es steht nur die Liste der Argumente zur Verfügung.
In order to match the output of this function with Excel's TDIST function, you must take 1 - the value. For example, for a two-tailed T-distribution for x=4 and degrees of freedom=2, the formula would be:
(1 - stats_cdf_t(4, 2, 1)) * 2
For a single tail, do not include the multiply by 2 portion.