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An alternative to the analysis of covariance for comparing randomized treatments
Authors:Norman S Matloff
Institution:University of California a t Davis , Davis, CA, 95616
Abstract:The problem of comparing mean responses for several treatments applied to a common population is considered. The analysis of co-variance ‘ANCOVA’ is frequently used to take advantage of covariate information in this setting, but in many cases ANCOVA's assumption of parallel regression functions precludes the use of ANCOVA. In this paper, an alternative method is developed which does not make this assumption
Keywords:treatment means  parallel regression functions
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