Documentation/How Tos/Calc: BINOMDIST function

BINOMDIST

Calculates probabilities for a binomial distribution.

Syntax:

BINOMDIST(k; n; p; mode)

With n independent trials, each with a probability p of success, BINOMDIST returns the probability that the number of successes will be

exactly k if mode is 0.

up to (and including) k if mode is 1.

BINOMDIST(k; n; p; 0) is equivalent to B(n; p; k); BINOMDIST(k; n; p; 1) is equivalent to B(n; p; 0; k).

Example:

BINOMDIST(3; 12; 0.5; 0)

returns approximately 0.05 (5%), the probability that heads will come up exactly 3 times in 12 flips of a coin.

BINOMDIST(3; 12; 0.5; 1)

returns approximately 0.07 (7%), the probability that heads will come up 0, 1, 2 or 3 times in 12 flips of a coin.

See also:

B

Statistical functions