statsexam2 10a

# Statsexam2 10a - Economic Statistics Exam 2 Last name First name PID Please sign that you abide by the honor pledge This exam contains fifteen

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Economic Statistics Exam 2 Last name: March 30, 2010 First name: PID: 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 20 points each). Please answer in the space provided; if you need more room, indicate clearly that the answer is continued on the back of the page. In all problems where you need to make a calculation, simplify your answer as much as possible. Show your work clearly to be eligible for partial credit. Some PDFs: Some probabilities: f ( x ) = 1 2 πσ 2 e ( X μ ) 2 σ 2 P [ x a ] = 1 e λ 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 1. The random variable X has a normal distribution with a mean of 16 and standard deviation of 5. What is the probability that the variable take a value between 15 and 20? 2. In a random sample of 200 people, 16 are left-handed. Construct a 90% confidence interval for the proportion of the population who are left-handed.

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Econ 400 Midterm 2, page 2 of 7. 3.
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## This note was uploaded on 01/11/2012 for the course ECON 400 taught by Professor Turchi during the Fall '08 term at UNC.

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Statsexam2 10a - Economic Statistics Exam 2 Last name First name PID Please sign that you abide by the honor pledge This exam contains fifteen

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