References
- Clarke , A. and Disney , R. 1970 . Probability and Random Processes for Engineers and Scientists , New York : John Wiley & Sons, Inc. .
- Deming , W. E. 1975 . On some statistical aids toward Economic Production . Interfaces , 5 ( 4 ) August
- Guttman , I. and Wilks , S. 1965 . Introductory Engineering Statistics , New York : John Wiley & Sons, Inc. .
- Harry , Mikel . 1988 . The Nature of Six Sigma Quality , Motorola, Inc., Government Electronics Group .
- Kiemele , M. , Schmidt , S. and Berdine , R. 1997 . Basic Statistics: Tools for Continuous Improvement, , 4th Ed. , Air Academic Press, Colorado Springs, Co. .
- Hahn , J. and Shapiro , G. 1967 . Statistical Methods in Engineering , New York : John Wiley and Sons .