statsexam2s09

statsexam2s09 - Economic Statistics Exam 2 March 31, 2009...

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Economic Statistics Exam 2 Last name: March 31, 2009 First name: PPID: Section number: Please sign that you abide by the honor pledge: This exam contains fifteen short answer questions ( worth 6 points each ) and three long answer questions ( worth 15 points each ) . Show your work clearly to be eligible for partial credit. In all problems where you need to make a calculation, simplify your answer as much as convenient. In questions with multiple parts, you should respond as if your answers to previous parts were correct. Some PDFs: Some probabilities: f ( x ) = 1 2 !" 2 e # ( X # μ ) 2 " 2 P [ x ! a ] = e " # a f ( x ) = 1 u ! ! P [ X ] = x e ! X ! f ( x ) = ! e " x P [ X ] = N ! X !( N ! X )! p X (1 ! p ) N ! X Short Questions ( 6 points apiece ) 1. The formal statement of a hypothesis has two parts. What are these called, and what does each describe? 2. What is the minimum variance unbiased estimator of the population variance?
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Econ 400 Midterm 2, page 2 of 7. 3. Each person has a 10% chance of being left - handed. I have a class of 100 students, and my classroom has 15 left - handed desks. What is the chance that I have more left - handed students than desks? 4. You want to determine whether the earnings of former prison inmates differ
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statsexam2s09 - Economic Statistics Exam 2 March 31, 2009...

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