# StdDev

int StdDev (double inputArray[], int numberOfElements, double *mean, double *standardDeviation);

## Purpose

Calculates the standard deviation and the mean, or average, values of the input array. StdDev uses the following formulas to find the mean and the standard deviation:

## Parameters

Input
Name | Type | Description
inputArray | double-precision array | Input array from which the mean and the standard deviation are determined.
numberOfElements | integer | Number of elements used to find the mean and the standard deviation.
Output
Name | Type | Description
mean | double-precision | Mean value of the input array.
standardDeviation | double-precision | Standard deviation of the input array.

## 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.