Question: =+b. Express the estimated regression in uncoded form. c. SSTo 5 17.2567 and R2 for the model of part (a) is .885. When a model

=+b. Express the estimated regression in uncoded form.

c. SSTo 5 17.2567 and R2 for the model of part (a)

is .885. When a model that includes only the four independent variables as predictors is fit, R2 5 .721. Carry out a test at level .05 to decide whether at least one of the second-order predictors provides useful information about brightness.

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