BETADIST
Category: Compatibility Function.
Description: Returns the beta cumulative distribution function.
Syntax: BETADIST(x,alpha,beta,[A],[B])
The BETADIST function syntax has the following arguments:
X: the value between A and B at which to evaluate the function.
Alpha: parameter to distribution.
Beta: parameter to distribution.
A: (optional) lower bound to the interval of x.
B: (optional) upper bound to the interval of x.