# WorksheetFunction.NormSInv Method (Excel)

Office 2010

Returns the inverse of the standard normal cumulative distribution. The distribution has a mean of zero and a standard deviation of one.

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 .NormSInv(Arg1)

expression A variable that represents a WorksheetFunction object.

### Parameters

Name

Required/Optional

Data Type

Description

Arg1

Required

Double

Probability - a probability corresponding to the normal distribution.

Double

## Remarks

• If probability is nonnumeric, NORMSINV returns the #VALUE! error value.

• If probability <= 0 or if probability >= 1, NORMSINV returns the #NUM! error value.

Given a value for probability, NORMSINV seeks that value z such that NORMSDIST(z) = probability. Thus, precision of NORMSINV depends on precision of NORMSDIST.