Abstract
SUMMARY A method is suggested for constructing incomplete block designs in which uncorrelated estimates of contrasts of interest have variances in a specified ratio. The designs are built up by using sets of blocks called bricks. Many of the constructed designs have blocks of different sizes. The choice between competing designs is made by choosing the one that maximizes the weighted sum of the effective replications. An example is given to illustrate the method.
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More From: Journal of the Royal Statistical Society Series B: Statistical Methodology
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