AK10_230 - ECO 230 Marianna Kudlyak Economic Statistics...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ECO 230 Marianna Kudlyak Economic Statistics Spring 2007 Answer Key to Homework #10 Total points: 10. Graded exercises: Exercise 1 (2 points),3 (2 points), 4 (2 points), and 7 (2 points). Half point for the presence of each of the remaining 3 exercises. Exercise 1. Newbold, Carlson and Thorne, Problem 7.53, p.267 Exercise 2 . Newbold, Carlson and Thorne, Problem 7.58, p.267 Let Difference = s 2 / 2 , then (n-1) s 2 / 2 = Difference(n-1) follows chi-square distribution with n-1 degrees of freedom. Exercise 3 . Newbold, Carlson and Thorne, Problem 7.61, p.268 Exercise 4 . Let X1, X2, Xn be a random sample (n > 4) from a population with mean and standard deviation . Consider the following two point estimators: X Y X X Z = + = 4 1 3 1 3 2 a) Are those estimators unbiased? Prove your answer. b) What estimator is more efficient? Prove in details by deriving the variance for each estimator....
View Full Document

Page1 / 3

AK10_230 - ECO 230 Marianna Kudlyak Economic Statistics...

This preview shows document pages 1 - 2. Sign up to view the full document.

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