hill 2+3 in czech (v cestine)

hill 2+3 in czech (v cestine) - Chapter 2, Exercise...

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Chapter 2, Exercise Solutions, Principles of Econometrics, 3e 2 EXERCISE 2.1 (a) x y x x () 2 x x y y x xyy −− 3 5 2 4 3 6 2 2 1 1 0 0 1 3 0 0 1 0 1 2 2 4 0 0 0 2 1 1 4 4 i x = i y = ( ) i x x = 2 i xx = ( ) y y = x = 5 10 0 10 0 10 1, 2 xy == (b) ( ) ( ) 2 2 10 1. 10 xxyy b = 2 b is the estimated slope of the fitted line. 12 2111 . byb x =− =−×= 1 b is the estimated value of y when x = 0, it is the estimated intercept of the fitted line. (c) 5 2 2222 2 1 321 1 01 5 i i x = =+++ −+= () () 5 1 35 2213 1 2 0 2 2 0 ii i = =×+×+×+−×+×− = 55 2 22 2 11 15 5 1
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