LOGNORMDIST

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

X	Mean	StdDev	Formula	Description (Result)
4	3.5	1.2	=LOGNORMDIST([X],[Mean],[StdDev])	Cumulative lognormal distribution at 4 with the specified arguments (0.039084)