Abstract
Any analysis of variance model (for example, anything in Chapters 6, 12, 13, or 14) can be expressed as a regression with dummy variables. The dummy variables are usually based on a set of contrasts . The algebra of individual contrast vectors is discussed in Section 6.9 Many software procedures and functions make explicit use of this form of expression. Here we explore this equivalence of different representations of the contrasts associated with a factor. The notation in Chapter 10 is that used in Sections I.4.2, 9.3, and 9.4.1.
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Heiberger, R.M., Holland, B. (2015). Multiple Regression—Dummy Variables, Contrasts, and Analysis of Covariance. In: Statistical Analysis and Data Display. Springer Texts in Statistics. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-2122-5_10
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