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Exam 2 Answers

Exam 2 Answers - ECN 425 Form A Q1 Q2(1 1 b Key for the...

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1 ECN 425 Key for the Second Exam DR. AHN Form A Q1. 1) b ; 2) b ; 3) a ; 4) a ; 5) c ; 6) b ; 7) b ; 8) b. Q2. (1) 1 1 2 3 ˆ 1/ 20 0 0 20 (1/ 20) 20 1 ˆ ˆ ( ) 0 1 6 2 1 2 6 1 8 ˆ 0 6 37 1 6 2 37 1 49 X X X Y      . (2) 2 2 120 20 1 100 TSS Y Y nY ; ˆ 35 RSS Y Y X Y ; 2 35 1 0.65 100 R . (3) (1,1,0); 1 R r . ˆ 1 8 1 8 R r ; 0.3 0 0 1 ˆ (1,1,0) 0 2 10 1 2.3 0 10 12 0 R R      . 1 2 ˆ ˆ ˆ ( ) ( ) ( ) 8 27.8 1 2.3 R r R R R r F . Q3. (1) 1.397 6.1; 1.96 0.229 t c t c Reject 1 : 0 o H . So, significant. (2) 2 2 2 138 138 0.177 4.323 140 2 138 RSS RSS SER SER RSS SER .
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