# N_Dist

Advanced Analysis Library Only

AnalysisLibErrType N_Dist (double x, double *probabilityX);

## Purpose

Calculates the one-sided probability:

p = prob(X x)

where X is a random variable from a standard normal distribution

For computing the two-sided probability

p2 = prob(–x X x)

you can use the following formula:

p2 = 1.0 – 2 × prob(X –x)

### Example

double x, p;
x = -123.456;
N_Dist (x, &p);

## Parameters

Input
Name | Type | Description
x | double-precision | The point from which the probability is computed. Range: –∞ < x < ∞
Output
Name | Type | Description
probabilityX | double-precision | Calculated probability (0 < p < 1).

## Return Value

Name | Type | Description
status | AnalysisLibErrType | A value that specifies the type of error that occurred. Refer to analysis.h for definitions of these constants.