UCSD ECON120C Midterm I Summer '08

UCSD ECON120C Midterm I Summer '08 - Economics 120C...

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Economics 120C Name: _________________________ Professor Yongil Jeon Summer 2008-2 Student ID#: _________________________ Homework #1 – Summer 2008-Session 2, Econ 120C (Midterm Exam, Summer 2008-Session 1, Econ 120C) Answer all questions on separate paper. This problem set should be handed in to Professor Jeon at the beginning of your class on Monday, August 18, 2008 . Problem sets may not be handed in once solutions have been distributed. Please write down your name and PID clearly. Good luck! 1) (3 points) One of differences between the central limit theorems for a scalar and vector-valued random variables is a. that n approaches infinity in the central limit theorem for scalars only. b. the conditions on the variances. c. that single random variables can have an expected value but vectors cannot. d. the homoskedasticity assumption in the former but not the latter. Answer : 2) (3 points) The linear multiple regression model can be represented in matrix notation as =+ YX U β , where X is of order n × ( k +1). k represents the number of a. regressors. b. observations. c. regressors excluding the “constant” regressor for the intercept. d. unknown regression coefficients Answer : 3) (3 points) One implication of the “extended” least squares assumptions in the multiple regression model is that a. feasible GLS should be used for estimation.
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This note was uploaded on 02/17/2009 for the course ECON ECON 120C taught by Professor Jeon,youngil during the Winter '09 term at UCSD.

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UCSD ECON120C Midterm I Summer '08 - Economics 120C...

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