random1234 Posted October 12, 2007 Share Posted October 12, 2007 Hi there all, i'm just curious as to whether theres a way to calculate NormalCDF probabilities using PHP? If there is, could somebody give me a hand in finding the solution as i've got not much of a clue on how to derive the normal distribution formula since my calculus has gotten rather scrappy. Thanks for the help. Quote Link to comment Share on other sites More sharing options...
kathas Posted October 13, 2007 Share Posted October 13, 2007 Hi there, I don't know my math (integrals are in the next semester) pal cause i haven't finished school yet but i believe you know yours... so i 've been here... That is how one calculates CMF. If you can calc the integral with php then you can cal CMF... (Although i have a feeling that this integral is supposed to give out a function since it is from minus infinity to x, which is not a calculable (scalar value) area, now can this integral be calculated with php???) Quote Link to comment Share on other sites More sharing options...
ToonMariner Posted October 15, 2007 Share Posted October 15, 2007 is there not a pecl distribution for stats????? you will need a lookup table to grab your z-values etc etc. how ever you can code the computations for working out much of the stats stuff - grab your equations for the normal distribution and roll your own - they are straight forward enough... Quote Link to comment Share on other sites More sharing options...
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