This function says, “CHIINV uses an iterative search technique”. This is specifying an implementation, not a testable performance criterion. Other approaches should be permitted.

Keep the suggestions, but put them in informative Notes or Guidance.

3.17.7.37 te

CHIINV 2564(2571)

Proposed Disposition of DIS 29500 Comment CO-0169 (Modified: 2007-11-06) Agreed; the following changes will be made to Part 4, §3.17.7.37, page 2,564, lines 15 and 22: 3.17.7.37 CHIINV Description: Computes the inverse of the one-tailed probability of the chi-squared distribution. Given a value for probability, CHIINV seeks for a value x such that CHIDIST(x, degrees-freedom) = probability. Thus, precision of CHIINV depends on precision of CHIDIST. CHIINV uses an iterative search technique. … However, if probability < 0 or probability > 1, #NUM! is returned. degrees-freedom < 1 or degrees-freedom 10 10 , #NUM! is returned. An implementation uses an iterative search technique, and t T he search has not converged after some implementation-defined number of iterations, #N/A is returned Similar Comments: CL-0176 , FR-0500 , GB-0381 , US-0278