# LogNormal Command

From GeoGebra Manual

Revision as of 10:25, 21 September 2015 by Markus.winkler (talk | contribs) (removed extra CAS syntax)

- LogNormal[ <Mean>, <Standard Deviation>, x ]
- Creates probability density function (pdf) of log-normal distribution with parameters mean
*μ*and standard deviation*σ*. - LogNormal[ <Mean>, <Standard Deviation>, x, <Boolean Cumulative> ]
- If
*Cumulative*is true, creates cumulative density function of log-normal distribution, otherwise creates pdf of log-normal distribution. - LogNormal[ <Mean>, <Standard Deviation>, <Variable Value> ]
- Calculates the value of cumulative distribution function of log-normal distribution at variable value
*v*, i.e. the probability*P(X ≤ v)*where*X*is a random variable with log-normal distribution given by parameters mean*μ*and standard deviation*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).