Suppose that both the least-squares line and the least squares parabola were fitted to the same set

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Suppose that both the least-squares line and the least squares parabola were fitted to the same set of points. Explain why the sum of the squares of the deviations of the points from the parabola cannot be larger than the sum of the squares of the deviations of the points from the straight line.
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Probability And Statistics

ISBN: 9780321500465

4th Edition

Authors: Morris H. DeGroot, Mark J. Schervish

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