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Log Normal PDF Function
Math Probability Class

Public Function LogNormalPDF( _
      ByVal vX As Variant _
    , Optional ByVal vMean As Variant = 0# _
    , Optional ByVal vStdDev As Variant = 1# _
    ) As Variant

Lognormal Probability Density Function

See also: 
    LogNormalCDF Function
    LogNormalInverse Function
    LogNormalRandom Function
    Declarations Topic
vX: Function returns Null if vX cannot be fixed up to a Double precision floating point number.
vMean: Mean of the distribution. Function returns Null if vMean cannot be fixed up to a Double precision floating point number. Argument defaults to a value of zero (0) if it is missing.
vStdDev: Standard deviation of the distribution. Function returns Null if vStdDev is less than or equal to zero (<=0). Argument defaults to a value of one (1) if it is missing.

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