PROBNEGB Function

Returns the probability from a negative binomial distribution.

Category:	Probability
See:	CDF Function

Syntax

PROBNEGB(p,n,m)

Required Arguments

p

is a numeric probability of success parameter.

Range

0 ≤ p ≤ 1

n

is an integer number of successes parameter.

Range

n ≥ 1

m

is a positive integer random variable, the number of failures.

Range

m ≥ 0

Details

The PROBNEGB function returns the probability that an observation from a negative binomial distribution, with probability of success p and number of successes n, is less than or equal to m.

To compute the probability that an observation is equal to a given value m, compute the difference of two probabilities from the negative binomial distribution for m and m−1.

Example

The following SAS statement produces this result.

SAS Statement	Result
x=probnegb(0.5,2,1);	0.5

PROBNEGB Function

Syntax

Required Arguments

p

n

m

Details

Example

See Also