LOGNORMDIST

See Also

Returns the cumulative lognormal distribution of x, where ln(x) is normally distributed with the parameters mean and standard_dev. Use this function to analyze data that has been logarithmically transformed.

Syntax

LOGNORMDIST(x,mean,standard_dev)

X is the value at which to evaluate the function.

Mean is the mean of ln(x).

Standard_dev is the standard deviation of ln(x).

Remarks

If any argument is nonnumeric, LOGNORMDIST returns the #VALUE! error value.
If x ≤ 0 or if standard_dev ≤ 0, LOGNORMDIST returns the #NUM! error value.
The equation for the lognormal cumulative distribution function is:

Example

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

How?

Create a blank spreadsheet.
Select the example in the Help topic.

Selecting an example from Help
Press CTRL+C.
In the spreadsheet, select cell A1, and press CTRL+V.
To switch between viewing the formula that returns the result and the result in the cell, select the cell and press F2 and then ENTER, or click Commands and Options on the spreadsheet toolbar, click the Formula tab, and look in the Formula in active cell (active cell) box.

Data	Description
4	Value at which to evaluate the function (x)
3.5	Mean of ln(x)
1.2	Standard deviation of ln(x)
Formula	Description (Result)
=LOGNORMDIST(A2,A3,A4)	Cumulative lognormal distribution at 4 with the terms above (0.039084)