The following is a set of data for y, the amount of money (thousands of dollars) contributed

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The following is a set of data for y, the amount of money (thousands of dollars) contributed to the alumni association at Virginia Tech by the Class of 1960, and x, the number of years following graduation:

(a) Fit a regression model of the type ? _Y?_x = 00 + 01X.

(b) Fit a quadratic model of the type ? _Y?_x = ?o + ?₁x + ?₂x².

(c) Determine which of the models in (a) or (b) is preferable. Use s², R², and the PRESS residuals to support your decision.

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Probability & Statistics For Engineers & Scientists

ISBN: 9780130415295

7th Edition

Authors: Ronald E. Walpole, Raymond H. Myers, Sharon L. Myers, Keying

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Question Posted: Feb 03, 2011 04:01 AM

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The following is a set of data for y, the amount of money (thousands of dollars) contributed

Question:

х х 812.52 2755.00 11 12 13 14 15 16 822.50 4390.50 1211.50 5581.50 4 1348.00 5548.00 6086.00 1301.00 5764.00 8903.00 2567.50 2526.50 10 17

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a 58721085 42843313x b 11800003219269121x 3520945...View the full answer

Probability & Statistics For Engineers & Scientists

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