Tolong jelaskan mengenai Fungsi Sebaran Kumulatif dari Sebaran normal dalam bahasa sunda

Fungsi sebaran kumulatif (saterusna disebut cdf) hartina probabilitas di mana nilai variabel X leuwih leutik tinimbang x, jeung digambarkeun dina watesan fungsi densiti nyaéta

Standar normal cdf, sacara konvensional dilambangkeun ku , mangrupa nilai cdf umum di-evaluasi ku  jeung ,

The standard normal cdf can be expressed in terms of a special function called the error function, as

The following graph shows the cumulative distribution function for values of z from -4 to +4:

On this graph, we see the probability that a standard normal variable has a value less than 0.25 is approximately equal to 0.60.