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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 ...
English: A selection of Normal Distribution Probability Density Functions (PDFs). Both the mean, μ , and variance, σ² , are varied. The key is given on the graph.
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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
The following other wikis use this file: Usage on bg.wikipedia.org Логаритъм; Usage on en.wikibooks.org The science of finance/Probabilities and evaluation of risks
Figure 2: The probability density function (pdf) of the normal distribution, also called Gaussian or "bell curve", the most important absolutely continuous random distribution. As notated on the figure, the probabilities of intervals of values correspond to the area under the curve.
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 file size distribution of publicly available audio and video data files follows a log-normal distribution over five orders of magnitude. [ 92 ] File sizes of 140 million files on personal computers running the Windows OS, collected in 1999.