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t PDF Function
Math Probability Class

Public Function tPDF( _
      ByVal vX As Variant _
    , ByVal vDF As Variant _
    ) As Variant

t Probability Density Function

See also: 
    tCDF Function
    tInverse Function
    tRandom Function
    Declarations Topic
vX: Function returns Null if vX cannot be fixed up to a Double precision floating point number.
vDF: Number of degrees of freedom. Number is rounded to the nearest integer. Function returns Null if vDF is less than or equal to zero (<=0).

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