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Lecture Notes #3: Contrasts and Post Hoc Tests 3-1
When the sample sizes are unequal, orthogonality can be defined as Xaibi ni = 0. (3-10) We will discuss different ways that sample size enters how we define effects when we cover main effects in factorial ANOVAs. I tend to favor what is called the regression approach where orthogonality is defined only by the contrast weights (as in Equation 3-
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