BETAINV

Returns the inverse of the cumulative beta probability density function. That is, if probability = BETADIST(x,...), then BETAINV(probability,...) = x. The cumulative beta distribution can be used in project planning to model probable completion times given an expected completion time and variability.

Syntax

BETAINV(probability,alpha,beta,A,B)

Probability   is a probability associated with the beta distribution.

Alpha   is a parameter to the distribution.

Beta   is a parameter to the distribution.

A   is an optional lower bound to the interval of x.

B   is an optional upper bound to the interval of x.

Remarks

Example

BETAINV(0.685470581,8,10,1,3) equals 2