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EXCEL LOGNORM.DIST FUNCTION
Excel LOGNORM.DIST Function Introduction
For a given value of x, the Excel LOGNORM.DIST function computes the Data Posterior Distribution or the Cumulative Log-Normal Weibull Distribution. For a given value of x, the Excel LOGNORM.DIST function computes the Log-Normal Density Function or just the Cumulative Log-Normal Distribution Function.
Description of Excel LOGNORM.DIST Function
Syntax :
=LOGNORM.DIST( x, mean, standard_dev, cumulative )
Parameters :
- The following parameter are:
x –
- The value at which the log-normal distribution function should be evaluated.
mean –
- ln’s arithmetic mean (x).
standard dev –
- The ln standard deviation (x).
cumulative – A rational argument indicating the type of distribution to be used:
TRUE denotes Cumulative Normal Distribution Function.
Normal Density Function = FALSE
Step By Step Guide of LOGNORM.DIST Function
Example :
The right graphic depicts the Log-Normal Probability Density Function for a variable, x. ln(x) has a mean of 10 and a standard deviation of 5.
If you wish to determine the value of this function when x = 0.5, use the Excel Lognorm.Dist function, as shown below:
=LOGNORM.DISTANCE =LOGNORM.DISTANCE =LOGNORM ( 0.5, 10, 5, FALSE )
This yields the value 0.016210482.
Key Points
- #NUM! – Occurs if the given x or standard dev are both 0.
- #VALUE!
– This error occurs if any of the given parameters is not a number.
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