QBA121 Formula Sheet(1).pdf - QBA 121 – Formula Sheet for Final Exam General Formulas n x n xi xi x sx i 1 n n 2 sxy i 1 n 1 xi x yi y i 1 n 1

# QBA121 Formula Sheet(1).pdf - QBA 121 – Formula Sheet for...

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QBA 121 Formula Sheet for Final Exam General Formulas: 1 n i i x n x 2 1 1 n i x i s n x x 1 1 1 1 xy n n i i i i i i s x x y y x y n x y n n xy xy x y r s s s Multiple Linear Regression: 0 1 1, 2 2, , .... i i i k k i i y x x x 2 ~ 0, i N 0 1 1 2 2 ˆ .... k k y b b x b x b x ˆ i i i y e y 2 2 2 1 1 n n i i i i SST y y y ny 2 1 n i i SSE e SSR SST SSE 2 SSR R SST 1 1 ) 1 ( 1 2 2 k n n R R a 2 1 1 n i i e S n k 0 1 : ... 0 k H ; :At least one 0 A i H , 1 ~ 1 statistic k n k SSR k F F SSE n k   0 : 0 i H ; : 0 A i H 1 ~ i i i statistic n k b b t t s   /2, 1 /2, 1 Pr 1 i i i n k b i i n k b b t s b t s     n s t x b x b x b b df k n k k / 1 1 1 , 2 / 2 2 1 1 0 Residual Analysis: s e s y y d i i i i ˆ 2 2 ) 1 ( ) ( 1 x i i s n x x n h 3( 1) c k h n 1 i i i e r s h i i i i h h k r D 1 ) 1 ( 2 Simple Linear Regression: 1

Unformatted text preview: 1 2 2 2 1 n i i xy y i xy n x x i i x y n x y s s b r s s x n x 1 b y b x 2 1 1 2 1 ~ , n i i b N x x 2 1 /2, 2 2 1 ( ) 1 ( 1) n x x x b b x t s n n s 2 1 /2, 2 2 1 ( ) ( 1) n x x x b b x t s n n s Time Series: 1 1 1, 1, 1 , , 1 ... t t t t k k t k t t y y x x x x u...
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• Fall '14
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