“lognormal distribution”的概念、定义、翻译、参考文献-科学参考

lognormal distribution

Mathematics

A positive valued random variable X is said to have a lognormal distribution if the random variable Y = lnX has a normal distribution.

Statistics

The distribution of a random variable X such that ln(X − θ) has a normal distribution, where θ is a parameter. There are two other parameters, δ (>0) and γ. The probability density function f is given by $lognormal distribution$ If we write $lognormal distribution$ the distribution has mean (θ+α ) and variance α²β(β − 1). The distribution has mode at θ+α/β. See johnson distributions.
Lognormal distribution. The distributions illustrated are for θ=0. They have mode at exp (−(1+γδ)/δ²).

单词	lognormal distribution
释义	lognormal distribution Mathematics A positive valued random variable X is said to have a lognormal distribution if the random variable Y = lnX has a normal distribution. Statistics The distribution of a random variable X such that ln(X − θ) has a normal distribution, where θ is a parameter. There are two other parameters, δ (>0) and γ. The probability density function f is given by $lognormal distribution$ If we write $lognormal distribution$ the distribution has mean (θ+α ) and variance α²β(β − 1). The distribution has mode at θ+α/β. See johnson distributions. Lognormal distribution. The distributions illustrated are for θ=0. They have mode at exp (−(1+γδ)/δ²).
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