NormProb ( x )
Returns the Gaussian Probability Integral
Average rating: 4.2 (37 votes) Log in to vote
Dr. Ronald W. Satz
Function definition: (Copy & paste into FileMaker's Edit Custom Function window)
This custom function returns the Gaussian (Normal) probability integral (area under the Bell curve) to the left of x (including the area to the left of the y axis). This is the left-tail of the probability distribution. To get the right-tail (which is 1 - NormProb (x)), call the function with the argument -x.
Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.