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Cubic Lattices

Pearce, S.C. (1995) Cubic Lattices. Journal of Applied Statistics, 22 (3). pp. 355-373. ISSN 0266-4763. (doi:10.1080/757584725) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:19442)

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In some experiments, the problem is to compare many unstructured treatments in small blocks, the classical example being the study of new plant varieties on variable land. A common method is to use lattice designs, i.e. block designs based upon rows and columns of a square format, with further replicates being formed, if required, from orthogonal squares applied to the format It has been known for some time that cubes can be used instead; this paper sets out to explore the possibilities. There are two cases. In one case, the blocks are formed from the planes of the cube and, in the other case, from its lines. The cubic lattice basically has three replicates-one from each dimension-but, if two or four replicates are required, a design can be found by omitting or duplicating one of the dimensions. Where standard treatments need to be introduced, a useful device is to reinforce, i.e. supplement each block with additional plots of standards, with each block of a replicate being supplemented in the same way. These possibilities are examined. It emerges that cubic lattices with two or three replicates usefully extend the range of available designs, but that those with four replicates are disappointing. However, there is the alternative of using designs based upon Latin cubes. This matter is not taken far but it is shown that, where the Latin cube exists, it gives a better design. A quick way of calculating an approximate analysis of variance is given, which is applicable in a wide range of cases.

Item Type: Article
DOI/Identification number: 10.1080/757584725
Subjects: Q Science > QA Mathematics (inc Computing science)
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Mathematics, Statistics and Actuarial Science
Depositing User: O.O. Odanye
Date Deposited: 28 May 2009 16:51 UTC
Last Modified: 16 Nov 2021 09:57 UTC
Resource URI: (The current URI for this page, for reference purposes)
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