Question: The Nelson Corporation decides to develop a multiple regression equation to forecast sales performance. A random sample of 14 salespeople is interviewed and given an

The Nelson Corporation decides to develop a multiple regression equation to forecast sales performance. A random sample of 14 salespeople is interviewed and given an aptitude test. In addition, an index of effort expended is calculated for each salesperson on the basis of a ratio of the mileage on his or her company car to the total mileage projected for adequate coverage of territory. Regression analysis yields the following results:

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