WorksheetFunction.NormInv Method (Excel)
Returns the inverse of the normal cumulative distribution for the specified mean and standard deviation.
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.
For more information about the new function, see the Norm_Inv method.
Syntax
expression .NormInv(Arg1, Arg2, Arg3)
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. |
Arg2 |
Required |
Double |
Mean - the arithmetic mean of the distribution. |
Arg3 |
Required |
Double |
Standard_dev - the standard deviation of the distribution. |
Return Value
Double
Remarks
If any argument is nonnumeric, NORMINV returns the #VALUE! error value.
If probability < 0 or if probability > 1, NORMINV returns the #NUM! error value.
If standard_dev ≤ 0, NORMINV returns the #NUM! error value.
If mean = 0 and standard_dev = 1, NORMINV uses the standard normal distribution (see NORMSINV).
Given a value for probability, NORMINV seeks that value x such that NORMDIST(x, mean, standard_dev, TRUE) = probability. Thus, precision of NORMINV depends on precision of NORMDIST. NORMINV uses an iterative search technique. If the search has not converged after 100 iterations, the function returns the #N/A error value.