betainc(A;B;X)

Returns the regularized incomplete beta function of the given values.

Syntax

betainc(A;B;X)

Input

Argument Type Description
A integer or decimal A must be greater than 0.
B integer or decimal B must be greater than 0.
X integer or decimal X must be between 0 and 1 inclusive.

Return Value

Returns a decimal value corresponding to the regularized incomplete beta function of A, B, and X: IX(A, B)

The regularized incomplete beta function can be used to evaluate the cumulative distribution function of a random variable from a binomial distribution.

If any argument is N/A, the result is N/A.

Sample Usage

a b x betainc(a;b;x)
1 3 0.4 0.2613333
2 3 0.8 0.0810667
9 1 0.4 2.9127111e-005
9 1 0.85 0.0257352
NA 3 0.8 NA