首页 | 本学科首页   官方微博 | 高级检索  
     


Interval estimation of process capability index cpk
Authors:N.F. Zhang  G.A. Stenback  D.M. Wardrop
Affiliation:Systems Development Department , Shell Development Company , P. O. Box 1380, Houston, Tx, 77251-1380
Abstract:
Several sampling distribution properties of the estimator for Cpk. are presented under the assumption that the data are normal, independent and identically distributed. In particular, the expectation, variance and skewness are derived. Since the sampling distribution is only weakly skewed, we concluded that a symmetric interval estimator for Cpk . might be reasonable. We developed such a symmetric interval estimator and conducted a simulation study to explore its coverage probabilities.
Keywords:Specification limits  process performance  normal distribution  sampling distribution
正在获取相似文献,请稍候...
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号