LOGINV function

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:

    Equation

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

    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.

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)

Applies To: Excel 2007



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