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Lognormal Distribution

If a random variable has a Lognormal Distribution, its natural logarithm has a Normal Distribution. This is the meaning of the term Lognormal.

Like the Exponential Distribution, the Lognormal Distribution can only be used for variables that are always positive.

A Lognormal Distribution can be useful for modeling variables such as cohesion, for example, which may have a large peak in the distribution near zero and then taper off gradually for larger values.

Lognormal Distribution

Lognormal probability density functions

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