# WorksheetFunction.NormDist Method (Excel)

Office 2013

Published: July 16, 2012

Returns the normal distribution for the specified mean and standard deviation. This function has a very wide range of applications in statistics, including hypothesis testing.

Important

This function has been replaced with one or more new functions that may provide improved accuracy and whose names better reflect their usage. This function is still available for compatibility with earlier versions of Excel. However, if backward compatibility is not required, you should consider using the new functions from now on, because they more accurately describe their functionality.

## Syntax

expression .NormDist(Arg1, Arg2, Arg3, Arg4)

expression A variable that represents a WorksheetFunction object.

### Parameters

Name

Required/Optional

Data Type

Description

Arg1

Required

Double

X - the value for which you want the distribution.

Arg2

Required

Double

Mean - the arithmetic mean of the distribution.

Arg3

Required

Double

Standard_dev - the standard deviation of the distribution.

Arg4

Required

Boolean

Cumulative - a logical value that determines the form of the function. If cumulative is TRUE, NORMDIST returns the cumulative distribution function; if FALSE, it returns the probability mass function.

Double

## Remarks

• If mean or standard_dev is nonnumeric, NORMDIST returns the #VALUE! error value.

• If standard_dev ≤ 0, NORMDIST returns the #NUM! error value.

• If mean = 0, standard_dev = 1, and cumulative = TRUE, NORMDIST returns the standard normal distribution, NORMSDIST.

• The equation for the normal density function (cumulative = FALSE) is:

• When cumulative = TRUE, the formula is the integral from negative infinity to x of the given formula.