LOGNORMDIST

LOGNORMDIST(x, mean, standard_dev)

Returns the cumulative probability function for a lognormal distribution (only cumulative).

x	The value at which to evaluate the function.
mean	The arithmetic mean of the distribution.
standard_dev	The standard deviation of the distribution.

REMARKS

* LOGNORM.DIST was added in Excel 2010 to replace this function and include an option for probability distribution.
* This function is only available for backwards compatibility and should not be used.
* The lognormal distribution is a continuous distribution
* This function always returns the cumulative probability function. There is no option for the probability distribution function.
* ln(x) is normally distributed with parameters mean and standard_dev.
* 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.
* This is similar to the BETADIST and HYPGEOMDIST functions.
* You can use the LOGNORM.INV function to return the inverse of the probability distribution function for a lognormal distribution.
* For the Microsoft documentation refer to support.microsoft.com

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