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[Step-by-Step] In Exercises 14.62 and 14.63, we repeat the data from exercises 14.38 and 14.39. We also provide the regression equations for those data from

Question: In Exercises 14.62 and 14.63, we repeat the data from exercises 14.38 and 14.39. We also provide the regression equations for those data from Exercises 14.40 and 14.41, respectively. For each exercise here,

compute the three sums of squares, SST, SSR, and SSE, using the defining formulas (page 719).
verify the regression identity, SST : SSR + SSE.
compute the coefficient of determination.
determine the percentage of variation in the observed values of the response variable that is explained by the regression.
state how useful the regression equation appears to be for making predictions. (Answers for this part may vary, owing to differing interpretations.)

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[Step-by-Step] In Exercises 14.62 and 14.63, we repeat the data from exercises 14.38 and 14.39. We also provide the regression equations for those data from

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