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A treatment term in an analysis of variance is said to be confounded if it is estimated in a stratum other than the bottom stratum of the design; specifically, the treatment term is said to be confounded with the block term that corresponds to the stratum. For example, in the split-plot design in Section 6.5 of the Genstat for Windows Introductory Course, variety is confounded with blocks.wplots.

Updated on December 4, 2017

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