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Beta Inverse Function
Math Probability Class

Public Function BetaInverse( _
      ByVal vProbability As Variant _
    , ByVal vAlpha As Variant _
    , ByVal vBeta As Variant _
    ) As Variant

Inverse Beta Cumulative Distribution Function

Examples: 
    BetaInverse(0.0, 8, 10) = 1.11022302462516E-16
    BetaInverse(0.1, 8, 10) = 0.297257177836922
    BetaInverse(0.5, 8, 10) = 0.442342318381321
    BetaInverse(0.9, 8, 10) = 0.594489487543468
    BetaInverse(1.0, 8, 10) = 0.991127762037771
See also: 
    BetaInverseExcel Function
    BetaCDF Function
    BetaRandom Function
    BetaPDF Function
    Declarations Topic
    BETAINV Function (Microsoft Excel)
vProbability: Function returns Null if vProbability is not between 0 and 1 inclusive.
vAlpha: Function returns Null if vAlpha is less than or equal to zero (<=0).
vBeta: Function returns Null if vBeta is less than or equal to zero (<=0).

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