Abstract
It is shown that in simple statistical designs in which a covariance adjustment is made for concomitant variation, an unbiased between-treatment mean square can be produced by weighted randomization, i.e., by selecting an arrangement at random from a set of arrangements, giving different arrangements in the set unequal chances of selection.
Citation
D. R. Cox. "A Note on Weighted Randomization." Ann. Math. Statist. 27 (4) 1144 - 1151, December, 1956. https://doi.org/10.1214/aoms/1177728081
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