Suppose that R2 = .723 for the model containing predictors x1, x4, x5, and x8 and R2= .689 for the model with predictors x1, x3, x5 and x6.
a. What can you say about R2 for the model containing predictors x1, x3, x4, x5 and x6 and x8? Explain. b. What can you say about R2 for the model containing predictors x1 and x4? Explain.
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