LOGNORM.DIST
Category: Statistical Function.
Description: Returns the log-normal probability density function or the cumulative log-normal distribution.
Syntax: LOGNORM.DIST(x,mean,standard_dev,cumulative)
'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).
'Cumulative' is the logical value that determines the form of the function.
If cumulative is 'TRUE', LOGNORM.DIST returns the cumulative distribution function; otherwise, it returns the probability density function.