LOGINV

See Also

Returns the inverse of the lognormal cumulative distribution function of x, where ln(x) is normally distributed with parameters mean and standard_dev. If p = LOGNORMDIST(x,...) then LOGINV(p,...) = x.

Use the lognormal distribution to analyze logarithmically transformed data.

Syntax

LOGINV(probability,mean,standard_dev)

Probability is a probability associated with the lognormal distribution.

Mean is the mean of ln(x).

Standard_dev is the standard deviation of ln(x).

Remarks

If any argument is nonnumeric, LOGINV returns the #VALUE! error value.
If probability < 0 or probability > 1, LOGINV returns the #NUM! error value.
If standard_dev <= 0, LOGINV returns the #NUM! error value.
The inverse of the lognormal distribution function is:

Example

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

How?

Create a blank workbook or worksheet.
Select the example in the Help topic. 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 Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

1

2
3
4

A	B
Data	Description
0.039084	Probability associated with the lognormal distribution
3.5	Mean of ln(x)
1.2	Standard deviation of ln(x)
Formula	Description (Result)
=LOGINV(A2, A3, A4)	Inverse of the lognormal cumulative distribution function for the terms above (4.000014)