﻿ NORMSINV function

# NORMSINV function

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

Syntax

NORMSINV(probability)

Probability     is a probability corresponding to the normal distribution.

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. NORMSINV uses an iterative search technique. If the search has not converged after 100 iterations, the function returns the #N/A error value.

Example

The example may be easier to understand if you copy it to a blank worksheet.

How to copy an example

1. Create a blank workbook or worksheet.

2. Select the example in the Help topic.

Note   Do not select the row or column headers.

Selecting an example from Help

3. Press CTRL+C.

4. In the worksheet, select cell A1, and press CTRL+V.

5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

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 A B Formula Description (Result) =NORMSINV(0.908789) Inverse of the standard normal cumulative distribution, with a probability of 0.908789 (1.3333)

Applies To: Excel 2007

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