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Date: 16-4-2021
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The Zipf distribution, sometimes referred to as the zeta distribution, is a discrete distribution commonly used in linguistics, insurance, and the modelling of rare events. It has probability density function
(1) |
where is a positive parameter and is the Riemann zeta function, and distribution function
(2) |
where is a generalized harmonic number.
The Zipf distribution is implemented in the Wolfram Language as ZipfDistribution[rho].
The th raw moment is
(3) |
giving the mean and variance as
(4) |
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(5) |
The distribution has mean deviation
(6) |
where is a Hurwitz zeta function and is the mean as given above in equation (4).
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علامات بسيطة في جسدك قد تنذر بمرض "قاتل"
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أول صور ثلاثية الأبعاد للغدة الزعترية البشرية
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مدرسة دار العلم.. صرح علميّ متميز في كربلاء لنشر علوم أهل البيت (عليهم السلام)
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