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Orthogonal Main-Effect Plans for Asymmetrical Factorials

Annie Chacko, A. Dey and G. V. S. Ramakrishna
Technometrics
Vol. 21, No. 2 (May, 1979), pp. 269-270
DOI: 10.2307/1268528
Stable URL: http://www.jstor.org/stable/1268528
Page Count: 2
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Abstract

Resolution III designs for 43· 2m experiments are constructed. These plans are available in 4n runs, where n is a multiple of four, and permit estimation of all main-effects orthogonally. Once the plans for 43· 2m experiments are obtained, one can get orthogonal main-effect plans for experiments of the type 4r3s2m by collapsing the levels of one or more four-level factors.

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