References
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- Lindgren , B. W. 1968 . Statistical Theory 2nd Ed , New York : Macmillan .
- Mood , A. M. , Graybill , F. A. and Boes , D. 1974 . Introduction to the Theory of Statistics 3rd Ed , New York : McGraw-Hill .
- Solomon , D. L. 1972 . On testing for sufficiency . The American Statistician , 26 : 37