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mathematical technique > probability theory > probability distribution > log-normal distribution

Terme préférentiel

log-normal distribution  

Définition(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)

Concept(s) générique(s)

Synonyme(s)

  • lognormal distribution

Traductions

URI

http://data.loterre.fr/ark:/67375/MDL-KZSFZ2DK-6

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