PROBHYPR Function

PROBHYPR Function

Returns the probability from a hypergeometric distribution

Category: Probability

See: 'CDF Function' on page 418

Syntax

PROBHYPR ( N,K,n,x <, r >)

Arguments

N

• is an integer population size parameter, with N ‰ 1.

• Range:

K

• is an integer number of items in the category of interest parameter.

• Range: ‰ K ‰ N

n

• is an integer sample size parameter.

• Range: ‰ n ‰ N

x

• is an integer random variable.

• Range: max (0, K + n - N ) ‰ x ‰ min ( K , n )

r

• is an optional numeric odds ratio parameter.

• Range: r ‰

Details

The PROBHYPR function returns the probability that an observation from an extended hypergeometric distribution, with population size N , number of items K , sample size n , and odds ratio r , is less than or equal to x . If the optional parameter r is not specified or is set to 1, the value returned is from the usual hypergeometric distribution.

Examples

SAS Statements	Results
x=probhypr(200,50,10,2);	0.5236734081