For model (c), conduct a tratio test for every single coefficient; that is, H0: j = 0

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For model (c), conduct a t–ratio test for every single coefficient; that is, H0: βj = 0 versus H1: j ≠ 0 for j = 1, 2, 3, 4. Perform an F-test for overall significance of the regression; that is, H0: (β1 = β2 = β3 = β4 = 0. Choose your own significance level.
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