noun
log-normal distribution; lognormal distribution
A probability distribution of a random variable whose logarithm is normally distributed. Used in statistics, finance, and natural sciences.
株価の変動率は対数正規分布に従うと仮定されることが多い。
Stock price returns are often assumed to follow a log-normal distribution.
このデータは対数正規分布で近似できる。
This data can be approximated by a log-normal distribution.
正規分布 is the normal distribution, while 対数正規分布 is the log-normal distribution, where the logarithm of the variable follows a normal distribution.
Compound of 対数 (logarithm) + 正規分布 (normal distribution), reflecting the mathematical definition.