STAT 501 Homework 9 Solution (Penn State)
1. (15 points)
(a) For X1, X2, and X3, AICp = 40× ln(465) − 40× ln(40) + 2 × 4 = 106.126
2. (8x6 = 48 points)
(a) The best three-variabl
... e model includes the variables X1, X3 and X3X4. The Cp and
3. (11 points)
(a) Model A:
4. (11 points)
(a) Below is a table summarizing the prefered model according to each different criterion, as well as the optimal value for that criterion.
5. (15 points) (a)
Best Subsets Regression: Y versus x1, x2, x3, x4
Response is Y
R-Sq
Vars R-Sq (adj)
1 58.5 57.2
1 3.6 0.7
2 65.6 63.6
2 61.0 58.6
3 66.4 63.2
R-Sq
(pred)
54.1
0.0
60.0
55.3
58.1
Mallows x x x x Cp S 1234
6.29 ------- X 57.1 0.26342 X
1.7 0.15961 X X 6.0 0.17012 X X[Show More]
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