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  1. en.wikipedia.org › wiki › Log-normal_distributionLog-normal distribution - Wikipedia

    1 天前 · Definitions Generation and parameters Let be a standard normal variable, and let and be two real numbers, with >.Then, the distribution of the random variable = + is called the log-normal distribution with parameters and .These are the expected value (or mean) and standard deviation of the variable's natural logarithm, not the expectation and standard deviation of itself.

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