Sir Ronald Aylmer Fisher FRS (17 February 1890 – 29 July 1962) was an English statistician, evolutionary biologist, geneticist, andeugenicist. Fisher is known as one of the chief architects of the neo-Darwinian synthesis, and for his important contributions to statistics, including the Analysis of Variance (ANOVA), method of maximum likelihood, fiducial inference, and the derivation of various sampling distributions. Anders Hald called him "a genius who almost single-handedly created the foundations for modern statistical science",[1] whileRichard Dawkins named him "the greatest biologist since Darwin".[2]
Lognormal Distribution Probability Density Function A variable X is lognormally distributed if Y = LN(X) is normally distributed with "LN" denoting the natural logarithm. The general formula for the probability density function of the lognormal distribution is where is the shape parameter , is the location parameter and m is the scale parameter . The case where = 0 and m = 1 is called the standard lognormal distribution . The case where equals zero is called the 2-parameter lognormal distribution. The equation for the standard lognormal distribution is Since the general form of probability functions can be expressed in terms of the standard distribution , all subsequent formulas in this section are given for the standard form of the function. The following is the plot of the lognormal probability density function for four values of . There are several commo...
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