# Knowledge Base

LognormalValue Returns Very Large Numbers

The LognormalValue function takes two parameters: mean and standard deviation. These are not the mean and standard deviation of the lognormal distribution – they are the mean and standard deviation of the underlying normal distribution

Recall that the lognormal distribution is defined as

$$X = e ^{N(\mu ,\sigma )}$$

If you want to specify the mean and standard deviation of the generated lognormal distribution, use the function ScaledLognormalValue.

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