mtermw04

# mtermw04 - UCSD Economics 120B Midterm Exam Professor Eli...

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1 UCSD Professor Eli Berman Economics 120B Thursday, February 5, 2004 Midterm Exam You are allowed one sheet of paper with equations on it and one calculator. The marks allocated to each question are given in brackets. Please read all the questions before starting and allocate your time accordingly. Good luck. (20) 1. A. Given a random sample of 40 observations of variables Y and X from some population, 1 provide a formula to estimate \$ , the slope of the population linear regression line. 1 B. Write a formula to estimate a 95% confidence interval for \$ . C. Now assume that 140 of your classmates sample from that population and estimate a confidence interval as in part A. Let z be the number of confidence intervals (between 0 and 140) that do 1 not contain \$ . Estimate the expected value of z, E(z)? (10 Bonus) D. What’s the variance of z, V(z)? (50) 2. For each statement below, indicate if it is true or false and write a sentence justifying your answer.

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mtermw04 - UCSD Economics 120B Midterm Exam Professor Eli...

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