PROBNEGB Function

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

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.

x=probnegb(0.5,2,1);

0.5

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