Manuals/calci/CHIINV

CHIINV(probability,degreesoffreedom)


  • Where is the value associated with the Chi-squared Distribution
  • is the number of Degrees of Freedom

Description

  • This function gives the inverse value of One_tailed probability of the Chi-squared Distribution.
  • It is called Inverted-Chi-square Distribution and it is a Continuous Probability Distribution of a positive-valued random variable.
  • Degrees of freedom  = .
  • The   static used to compare the observed value in each table to the value which would be the expected under the assumption.
  • If   has the chi-squared distribution with n degrees of freedom, then according to the definition,   has the Inverse-chi-squared distribution with   degrees of freedom;
  • If  , then  .
  • CHIINV use the iterating method to find the value of  .suppose the iteration has not converged after 100 searches, then the function gives the error result.
  • This function will give the error result when
1.Any one of the arguments are non-numeric
2.  value is not an integer
3. or  
4.Also   or  .

ZOS Section

  • The syntax is to calculate CHIINV in ZOS is  .
    • Where   is the value associated with the Chi-squared Distribution
    •   is the number of Degrees of Freedom
  • For e.g.,CHIINV(0.0257,3)
Inverse Chi-Squared Distribution

Examples

  1. CHIINV(0.0001234098,2) = 18
  2. CHIINV(0.2547876,5) = 6.56699
  3. CHIINV(0.157299207050,1) = 2
  4. CHIINV(0.6785412,-1) = NAN

See Also

References

Inverse-chi-squared Distribution