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The simplest case of a normal distribution is known as the standard normal distribution or unit normal distribution. This is a special case when μ = 0 {\textstyle \mu =0} and σ 2 = 1 {\textstyle \sigma ^{2}=1} , and it is described by this probability density function (or density): φ ( z ) = e − z 2 2 2 π . {\displaystyle \varphi (z ...
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File:PDF-log normal distributions.svg. ... This vector image was created with a text editor by ... Probability distribution function of log-normal distribution: Width ...
This image is a derivative work of the following images: Lognormal distribution PDF.png licensed with Cc-by-sa-3.0-migrated, GFDL 2005-05-03T04:48:16Z PAR 1300x975 (192660 Bytes) Probability density function for the Log-normal distribution; Uploaded with derivativeFX
The normal-exponential-gamma distribution; The normal-inverse Gaussian distribution; The Pearson Type IV distribution (see Pearson distributions) The Quantile-parameterized distributions, which are highly shape-flexible and can be parameterized with data using linear least squares. The skew normal distribution
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The image on the right, made with CumFreq, illustrates an example of fitting the log-normal distribution to ranked annually maximum one-day rainfalls showing also the 90% confidence belt based on the binomial distribution.
Normal distributions are symmetrical, bell-shaped distributions that are useful in describing real-world data. The standard normal distribution, represented by Z, is the normal distribution having a mean of 0 and a standard deviation of 1.