Biometrical Letters vol. 45(2), 2008, pp. 23-29


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SOME EFFICIENCIES OF BLOCK DESIGNS

H. Brzeskwiniewicz, J. Krzyszkowska

Department of Mathematical and Statistical Methods, Poznan University of Life Sciences,
Wojska Polskiego 28, 60-637 PoznaƄ,
e-mail: henbrzes@up.poznan.pl, e-mail: krzyszko@up.poznan.pl


Simple lower bounds for A-, D-, E- and L-efficiency of block designs are derived. The bounds are obtained on the basis of the eigenvalues of information matrix Cd with respect to the diagonal matrix Rd.


A-efficiency, D-efficiency, E-efficiency, L-efficiency, block design, eigenvalues, lower bound.