Lognormal distribution

Returns the lognormal cumulative distribution of a random variable X, where the logarithm of X is normally distributed. LognormalDistribution takes mean and standard deviation as parameters. This function is used to analyze data that has been logarithmically transformed.

Syntax

LognormalDistribution(x, Mean, Stdev)

Where:

x is the value at which the function is evaluated.

Mean is the mean of ln(x).

Stdev is the standard deviation of ln(x).

Expression

In the expression that follows, mean = m, stdev = s.

Usage Notes

The following conditions are invalid:

• One of the arguments is nonnumeric
• x £ 0
• stdev £ 0