Test2b_KEY_Sp11

# Test2b_KEY_Sp11 - B Name_KEY 4 March 2011 IE330 Spring 2011...

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Name: ______________KEY________________ B 4 March 2011 IE330 Spring 2011 Test 2b Closed book, closed notes, no calculators. Remain on this page until you are told to start. 1 of 6 ( 29 ( 29 ( 29 ( 29 ( 29 1 2 1 2 * 1 2 0 0 0 0 2 2 1 2 2 2 2 1 2 1 2 1 2 0 0 2 2 2 2 2 2 1 1 2 2 1 2 1 2 2 2 1 1 2 2 2 1 2 0 0 1 2 1 2 1 2 0 Some helpful test statistics: / , / / 1 1 1 1 , 2 1 1 ˆ ˆ ˆ ˆ 1 D p p X X D Z T S n n n S S n n X X T s s S n S n n n n n n S n S X X T S n n S n n P P Z P P σ σ υ - - ∆ - ∆ = = + + - - ∆ = = + + - - - + - - - ∆ = = + - + - = - 1 2 2 1 2 2 1 1 n n S F S + =

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Name: ______________KEY________________ B THIS PAGE INTENTIONALLY LEFT BLANK 2 of 6
Name: ______________KEY________________ B 1. (10 points) In a regression of y vs. x , which of the following assumptions must be checked to determine whether the regression can be considered valid or not, regardless of its significance? (Choose all that are correct.) a. The s value of the regression b. The p-value of 1 β c. The magnitude of the residuals d. That the residuals are independently and identically distributed. e. That the residuals are normally distributed f. None of the above 2. (5 points) (True or False) In a regression of y vs. x

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