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Below Is a Partial Multiple Regression Computer Output Based on a Quadratic

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Below is a partial multiple regression computer output based on a quadratic regression model. Below is a partial multiple regression computer output based on a quadratic regression model. Test the usefulness of the variable X<sup>2</sup> in the model at = .05. Test the usefulness of the variable X2 in the model at Below is a partial multiple regression computer output based on a quadratic regression model. Test the usefulness of the variable X<sup>2</sup> in the model at = .05. = .05.

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