Question: =+b. If we include in the model only the predictors x1, x2, and x3, the corresponding SSResid 5 11.428. Carry out a test at significance

=+b. If we include in the model only the predictors x1, x2, and x3, the corresponding SSResid 5 11.428.

Carry out a test at significance level .01 to decide whether at least one of the second-order predictors provides useful information about SDF content.

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