Question: 'Derive the normal equations (Equations 5.7) for the least-squares coefficients of the general multiple-regression model with k explanatory variables. [Hint: Differentiate the sum-of-squares function SA;

'Derive the normal equations (Equations 5.7) for the least-squares coefficients of the general multiple-regression model with k explanatory variables. [Hint: Differentiate the sum-of-squares function SðA; B1; ... ; Bk Þ with respect to the regression coefficients, and set the partial derivatives to 0.]

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