Textbook Analysis of Covariance -- Is It Correct?

Abstract

For unbalanced Model I ANOVA data there is a controversy in the literature -- should the partial SS's be computed hierarchically or should they be computed after fitting all other model terms including higher-order interactions? A similar problem exists in the Model I analysis of covariance (ANCOVA), yet the usual prescription given in textbooks uses only the non-hierarchical approach. Using two classic examples of ANCOVA, this paper examines the two approaches to ANCOVA calculations. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1981
Accession Number
ADA102617

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  • Christopher Bingham
  • Stephen E. Fienberg

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  • Carnegie Mellon University

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  • C4I

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  • Analysis Of Variance
  • Biometrics
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  • Covariance
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  • Statistical Inference
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