Sankhya: The Indian Journal of Statistics

1995, Volume 57, Series B, Pt. 3, pp. 405--419

ROBUSTNESS OF AUGMENTED BIB DESIGNS AGAINST UNAVAILABILITY OF SOME OBSERVATIONS

By

XIAOPING DUAN, SANPEI KAGEYAMA, Hiroshima University

SUMMARY. Robustness of Augmented Balanced Incomplete Block (ABIB) designs is investigated, when any number of observations in a block or any two observations in the design are lost, in terms of efficiency of the residual design. The investigation shows that ABIB designs fairly robust against the above mentioned unavailability of observations.

AMS (1980) subject classification.  62K10, 05B05, 62K05.

Key words and phrases. BIB, augmented BIB, efficiency, C-matrix.

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