BetaDist Command

BetaDist( <Number α>, <Number β>, <Variable value> ): Calculates the value of the cumulative distribution function of a Beta distribution with parameters α, β at the variable value v, that is the probability P(X≤v) where X is a random variable with a beta distribution with parameters α and β
BetaDist( <Number α>, <Number β>, <Variable value>, <Boolean Cumulative> ): If Cumulative is true, calculates the value of the cumulative distribution function of a Beta distribution with parameters α and β at the variable value v. If Cumulative is false, it calculates the value of the probability density function (pdf) of the corresponding beta distribution at v.
BetaDist(<Number α>, <Number β>, x, <Boolean Cumulative>): If Cumulative is true, creates the cumulative distribution function of a beta distribution with parameters α and β, otherwise it creates the probability density function (pdf) of the corresponding Beta distribution.