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Beta PDF Function
Math Probability Class

Public Function BetaPDF( _
      ByVal vX As Variant _
    , ByVal vAlpha As Variant _
    , ByVal vBeta As Variant _
    ) As Variant

Beta Probability Density Function

Examples: 
    BetaPDF(0.0, 8, 10) = 0
    BetaPDF(0.1, 8, 10) = 7.53455367007202E-03
    BetaPDF(0.5, 8, 10) = 2.96752929687501
    BetaPDF(0.9, 8, 10) = 0.000093019181112
    BetaPDF(1.0, 8, 10) = 0
    BetaPDF(1.5, 8, 10) = -6489.98657226564
See also: 
    BetaCDF Function
    BetaCDFExcel Function
    BetaInverse Function
    BetaInverseExcel Function
    BetaRandom Function
    Declarations Topic
    Beta Function
vX: Function returns Null if vX cannot be fixed up to a Double precision floating point number.
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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