Formulas and functions > Functions from A to Z > NORMINV (percentiles of the normal distribution)

Note: NORMINV is supplemented by the new identical function NORM.INV, which is available in newer versions of Microsoft Excel (2010 or later).

Syntax:

NORMINV(Probability, Mean, StdDev)

Description:

This returns the inverse of the normal cumulative distribution function NORMDIST.

Probability is the given probability from the distribution. The values must be within the range 0 to 1.

Mean is the arithmetic mean of the distribution.

StdDev is the standard deviation of the distribution. This must be > 0.

Note:

The result of this function is calculated using an iteration method. If, after 100 iterations, PlanMaker does not find a result that deviates less than ±3x10^-7 from Probability, it displays the error value #N/A and cancels the approximation.