On the distribution of the estimated process yield index Spk

SUMMARY This paper considers an asymptotic distribution for an estimate ˆ Spk of the process yield index Spk proposed by Boyles (1994). The asymptotic distribution of ˆ Spk is useful in statistical inferences for Spk. An illustrative example is given for hypothesis testing and for interval estimation on the yield index Spk. Copyright  2002 John Wiley & Sons, Ltd.