LOGNORMDIST(x, mean, standard_dev)

Returns the probability of getting less than or equal to a particular value in a lognormal distribution (no cumulative).

xThe value at which to evaluate the function.
meanThe arithmetic mean of the distribution.
standard_devThe standard deviation of the distribution.

Remarks

* LOGNORM.DIST was added in Excel 2010 to replace this function.
* In Excel 2010 the LOGNORM.DIST function has an additional parameter "cumulative".
* This function always returns the cumulative distribution function. There is no option for the probability mass function.
* ln(x) is normally distributed with parameters mean and standard_dev.
* The lognormal distribution is a continuous distribution.
* If any of the arguments are not numeric, then #VALUE! is returned.
* If "x" = 0, then #NUM! is returned.
* If "standard_dev" = 0, then #NUM! is returned.
* This function can be used to analyze data that has been logarithmically transformed.
* In Excel 2010 the accuracy of this function was improved.
* For the Microsoft documentation refer to support.office.com

 A
1=LOGNORMDIST(4,3.5,1.2) = 0.039
2=LOGNORMDIST(4,"some text",1.2) = #VALUE!

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