metricsexam0f08

Metricsexam0f08 - Econometrics Exam 0 Sept 5 2008 By writing your PID below you are indicating your intention to abide by the honor pledge PID This

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Econometrics Exam 0 By writing your PID below, you are indicating Sept. 5, 2008 your intention to abide by the honor pledge: PID: This exam consists of ten short questions ( worth four points apiece ) and three long questions ( worth twelve points each ) , for a total of 76 points. You have 50 minutes to answer all completely and clearly in the space provided. For better and for worse, I am grading you primarily on technique and secondarily on correct answers. Short Questions 1. Suppose that X has a mean of 5 , and variance of 9 ; Y has a mean of 7 , and variance of 16 ; the two random variables are independent. If you created Z = 2 X ! Y , what would be E [ Z ] and Var ( Z ) ? 2. Given three matrices A , B , and C , rewrite the expression ( A + BC ! ) without parentheses. 3. What is the difference between “ Var ( X ) ” and “ V ˆ ar ( X ) ”?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4. Define the following matrices as: y = y 1 y 2 ! " # $ % A
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/19/2010 for the course ECON 570 taught by Professor Staff during the Spring '08 term at UNC.

Page1 / 6

Metricsexam0f08 - Econometrics Exam 0 Sept 5 2008 By writing your PID below you are indicating your intention to abide by the honor pledge PID This

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online