# NORMSINV

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.

• Create a blank workbook or worksheet.
• Select the example in the Help topic.

Note   Do not select the row or column headers.

Selecting an example from Help
• Press CTRL+C.
• In the worksheet, select cell A1, and press CTRL+V.
• 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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Formula Description (Result)
=NORMSINV(0.908789) Inverse of the standard normal cumulative distribution, with a probability of 0.908789 (1.3333)

Applies to:
Excel 2003