# Difference between revisions of "LogNormal Command"

From GeoGebra Manual

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## Revision as of 21:18, 9 March 2013

- LogNormal[ <Mean μ>, <Standard Deviation σ>, x ]
- Creates probability density function (pdf) of log-normal distribution with parameters
*μ, σ*. - LogNormal[ <Mean μ>, <Standard Deviation σ>, x, <Boolean Cumulative> ]
- If
*Cumulative*is true, creates cumulative density function of LogNormal distribution, otherwise creates pdf of log-normal distribution. - LogNormal[ <Mean μ>, <Standard Deviation σ>, <Variable Value v> ]
- Calculates the value of cumulative distribution function of log-normal distribution at
*v*, i.e. the probability*P(X≤v)*where*X*is a random variable with log-normal distribution given by parameters*μ, σ*. **Note:**Returns the probability for a given*x*-coordinate's value (or area under the log-normal distribution curve to the left of the given*x*-coordinate).

## CAS Syntax

- LogNormal[ <Mean μ>, <Standard Deviation σ>, <Variable Value v>]
- Calculates the value of cumulative distribution function of log-normal distribution at
*v*, i.e. the probability*P(X≤v)*where*X*is a random variable with log-normal distribution given by parameters*μ, σ*.