Posted by **tar** on Sunday, December 9, 2007 at 10:45pm.

a sales manager used linear regression to find the positive linear relationship between advertising expenditures and sales. The amount of advertising expenditures used to generate the regression equation ranged from $8,000 to $45,000.

The sales manager wants to use the equation to predict the amount of sales that can be expected from advertising expenditures of $55,000 and $65,000.

Which would be more reliable, the sales predicted from the $55,000 advertising expenditure or from the $65,000 expenditure? Explain why!

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