Concept information
Preferred term
log-normal distribution
Definition(s)
- In probability theory, a log-normal (or lognormal) distribution is a continuous probability distribution of a random variable whose logarithm is normally distributed. Thus, if the random variable X is log-normally distributed, then Y = ln(X) has a normal distribution. Equivalently, if Y has a normal distribution, then the exponential function of Y, X = exp(Y), has a log-normal distribution. A random variable which is log-normally distributed takes only positive real values. It is a convenient and useful model for measurements in exact and engineering sciences, as well as medicine, economics and other topics (e.g., energies, concentrations, lengths, prices of financial instruments, and other metrics). (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Log-normal_distribution)
Broader concept(s)
Synonym(s)
- lognormal distribution
In other languages
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French
URI
http://data.loterre.fr/ark:/67375/MDL-KZSFZ2DK-6
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