# hw3_answer_econ120a_w08 - Economics 120A Professor Yongil...

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Economics 120A Name: _________________________ Professor Yongil Jeon Winter 2008 Student ID#: _________________________ Answer to Homework #3 – Winter 2008 (Part of Final Exam, Summer 2007) Answer all questions on separate paper. This problem set should be handed in to Professor Jeon at the beginning of your discussion session on March 6th or 7th, 2008. Problem sets may not be handed in once solutions have been distributed. Please write down your name and PID clearly. Good luck! 1. (20 points) True/False 1-a) (2 points) The estimator ˆ θ is said to be an unbiased estimator of if var( ˆ ) =var( ). Answer: False 1-b) (2 points) The bias of an estimator ˆ is equal to E( ˆ )- . Answer: True 1-c) (2 points) The sample standard deviation is an example of an estimator. Answer: True 1-d) (2 points) When computing the confidence interval for the population proportion, you use Student’s t-distribution rather than the normal distribution. Answer: False 1-e) (2 points) If we are unable to reject the null hypothesis, we accept the alternative hypothesis.

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hw3_answer_econ120a_w08 - Economics 120A Professor Yongil...

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