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FDIST (Number,DegreeOfFreedom1,DegreeOfFreedom2)

  • is the value of the function
  • and are numbers of degrees of freedom.
    • FDIST(), returns the F probability distribution.


  • This function gives the value of F probability distribution.
  • This distribution is continuous probability distribution and it is called Fisher-Snedecor distribution.
  • The F distribution is an asymmetric distribution that has a minimum value of 0, but no maximum value.
  • In   is the value of the function ,  is the numerator degrees of freedom and   is the denominator degrees of freedom.
  • This distribution is the ratio of two chi-square distributions with degrees of freedom r1 and r2, respectively, where each chi-square has first been divided by its degrees of freedom.
  • The Probability density function of the F distribution is:

    where   is the Gamma Function.

  • The gamma function is defined by  .

When the value of DegreeOfFreedom1 and DegreeOfFreedom2 are not integers ,then it is converted in to integers.

  • This function will give the result as error when
 1. any one of the argument is non-numeric.
 2. Number is negative
 3. If DegreeOfFreedom1<1  or DegreeOfFreedom2>  and  DegreeOfFreedom2<1 or DegreeOfFreedom2>  


  • The syntax is to find FDIST in ZOS is  .
    •   is the value of the function.
  • For e.g.,FDIST(85.2,22,18)
  • FDIST(67..70,6,8)


  1. =FDIST(20.6587,7,3) = 0.01526530981
  2. =FDIST(70.120045,12.2,6.35) = 0.000011229898
  3. =FDIST(10,1.3,1.5) = 0.12923064798773362
  4. =FDIST(-28,4,6) = #N/A (NUMBER > 0)

Related Videos

F Distribution

See Also