BETAINV Function

BETAINV Function

Returns a quantile from the beta distribution

Category: Quantile

Syntax

BETAINV ( p,a,b )

Arguments

p

• is a numeric probability.

• Range: ‰ p ‰ 1

a

• is a numeric shape parameter.

• Range: a > 0

b

• is a numeric shape parameter.

• Range: b > 0

Details

The BETAINV function returns the p th quantile from the beta distribution with shape parameters a and b . The probability that an observation from a beta distribution is less than or equal to the returned quantile is p .

Note: BETAINV is the inverse of the PROBBETA function.

Examples

SAS Statements	Results
x=betainv(0.001,2,4);	0.0101017879