管理經(jīng)濟(jì)學(xué),英文版(存儲(chǔ)版)
【正文】 al Economics Thomas Maurice ninth edition McGrawHill/Irwin Managerial Economics, 9e Chapter 4 Basic Estimation Techniques Managerial Economics 42 Simple Linear Regression ? Simple linear regression model relates dependent variable Y to one independent (or explanatory) variable X Y a b X??? aYYYXIn tercep t p a ra m ete r ( ) gives v a l u e o f w here regress io n l in e cr o s s es a x is ( v a l ueo f w hen is z ero )? Slope parameter (b) gives the change in Y associated with a oneunit change in X, b Y / X? ? ?Managerial Economics 43 Method of Least Squares ? The sample regression line is an estimate of the true regression line ? abP a ra m e t e r e s t i m a t e s a re obt a i ne d byc hoos i ng v a l ue s of amp。 are rand om v aria b l e s p u t e d u s ingdat a f rom a rand om s am p l eManagerial Economics 46 Relative Frequency Distribution* (Figure ) 0 8 2 10 4 6 1 1 3 5 7 9 R e la tiv e f re q u e n c y of ?bL e a s t s q u a r e s e
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