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The hypergeometric distribution

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The hypergeometric distribution describes the probability of  successes in  draws from a finite population size  containing  successes without replacement. This contrasts with the binomial distribution which describes the probability of  successes in  draws with replacement

 

Distribution name

Hypergeometric distribution

Common notation

Parameters

 = population size, integral ()

 = sample size, integral ()

 = number of tagged items, integral ()

Domain

Probability mass function

Cumulative distribution function

where

 is the generalised hypergeometric function, i.e.

and  involves the rising factorial or Pochhammer notation, i.e.  and

Mean

Variance

Skewness

(Excess) kurtosis

where

Characteristic function

 

Nematrian web functions

 

Functions relating to the above distribution may be accessed via the Nematrian web function library by using a DistributionName of “hypergeometric”. For details of other supported probability distributions see here.

 


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