Consider the following sample regressions for the linear and quadratic models along with their respective R 2

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Consider the following sample regressions for the linear and quadratic models along with their respective R2 and adjusted R2.

Linear Quadratic Intercept 1.1006 12.1338 -3.1034 0.5828 х 0.2565 x2 NA R2 0.4814 0.7843 Adjusted R2 0.4166 0.7226


a. Use the appropriate goodness-of-fit measure to justify which model fits the data best.

b. Given the best-fitting model, predict y for x = 4, 6, and 12.

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