Returns the cumulative lognormal distribution of x, where ln(x) is normally distributed with parameters mean and standard_dev. Use this function to analyze data that has been logarithmically transformed.
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).
- 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:
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
- Create a blank workbook or worksheet.
- Select the example in the Help topic.
Note 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 Formulas tab, in the Formula Auditing group, click the Show Formulas button.
||Value at which to evaluate the function (x)
||Mean of ln(x)
||Standard deviation of ln(x)
||Cumulative lognormal distribution at 4 with the terms above (0.039084)