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A-Optimal Block Designs with Additional Singly Replicated Treatments

Agnes Herzberg and Richard Jarrett

Journal of Applied Statistics, 2007, vol. 34, issue 1, 61-70

Abstract: Block designs to which have been added a number of singly-replicated treatments, known as secondary treatments, are particularly useful for experiments where only small amounts of material are available for some treatments, for example new plant varieties. The designs are of particular use in the microarray situation. Such designs are known as 'augmented designs'. This paper obtains the properties of these designs and shows that, with an equal number of secondary treatments in each block, the A-optimal design is obtained by using the A-optimal design for the original block design. It develops formulae for the variance of treatment comparisons, for both the primary and the secondary treatments. A number of examples are used to illustrate the results.

Keywords: Augmented designs; chain-block designs; coat-of-mail designs; block designs; efficiency; microarray designs; optimality; secondary treatments; singly-linked block designs (search for similar items in EconPapers)
Date: 2007
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Citations: View citations in EconPapers (2)

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DOI: 10.1080/02664760600744512

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