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LOGNORM.INV function: Description, Usage, Syntax, Examples and Explanation

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What is LOGNORM.INV function in Excel?

LOGNORM.INV function is one of Statistical functions in Microsoft Excel that 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 = LOGNORM.DIST(x,…) then LOGNORM.INV(p,…) = x.
Use the lognormal distribution to analyze logarithmically transformed data.

Syntax of LOGNORM.INV function

LOGNORM.INV(probability, mean, standard_dev)

The LOGNORM.INV function syntax has the following arguments:

  • Probability    Required. A probability associated with the lognormal distribution.
  • Mean    Required. The mean of ln(x).
  • Standard_dev    Required. The standard deviation of ln(x).

LOGNORM.INV formula explanation

  • If any argument is nonnumeric, LOGNORM.INV returns the #VALUE! error value.
  • If probability <= 0 or probability >= 1, LOGNORM.INV returns the #NUM! error value.
  • If standard_dev <= 0, LOGNORM.INV returns the #NUM! error value.

Example of LOGNORM.INV function

Steps to follow:

1. Open a new Excel worksheet.

2. Copy data in the following table below and paste it in cell A1

Note: For formulas to show results, select them, press F2 key on your keyboard and then press Enter.

You can adjust the column widths to see all the data, if need be.

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
=LOGNORM.INV(A2, A3, A4) Inverse of the lognormal cumulative distribution function for the terms above 4.0000252

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