Test2c_KEY_Sp11

# Test2c_KEY_Sp11 - C Name_KEY 4 March 2011 IE330 Spring 2011...

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Name: ______________KEY_____________________ C 4 March 2011 IE330 Spring 2011 Test 2c 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 υ - - ∆ - ∆ = = + + - - ∆ = = + + - - - + - - - ∆ = = + - + - = - 1 2 2 1 2 2 1 1 n n S F S + =

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Name: ______________KEY_____________________ C 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. That 2 R < s b. That the scatterplot of y vs. x shows a linear trend. c.

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Test2c_KEY_Sp11 - C Name_KEY 4 March 2011 IE330 Spring 2011...

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