Question: By creating a new predictor variable for the term involving the product X1X2, show the normal equations for the following model: Using the data base

By creating a new predictor variable for the term involving the product X1X2, show the normal equations for the following model:

Using the data base from Table 13.16, insert the values of the summations into the normal equations.
(Note: It is not necessary to solve for the values of the unknowns.)

Y = bo+bX + bX+b3XX2

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