Sp09_Mid2A

Sp09_Mid2A - EC 41, UCLA Spring 2009 Midterm #2 5/13/09...

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EC 41, UCLA Spring 2009 Name (print)________________________________ Midterm #2 – 5/13/09 TA: Name__________________________ & Section Time_____________ - The normal table and useful formulas are on the last page of this exam. - Only pens, pencils and erasers may be used, this is a closed book, closed note, exam. - Students may use a calculator, but nothing that can access the internet. - Write non-integer answers to 3 significant digits, e.g., 333, or 3.33 or .0333 - This exam consists of 10 True/False (20 points), 10 short answer (40 points) and 4 longer questions (40 points) - Clearly write answers on this exam. No points are awarded for illegible answers. - Be prepared to show a photo ID during the exam (e.g., UCLA ID) - You may leave when finished. Do not disrupt those still taking the exam. I. Circle T for True or F for False (2 points each) 1) T or F The p-value from Excel regression output assumes a two-sided alternate hypothesis, H A 2) T or F A confidence interval gets more narrow (smaller) as the number of observations in a sample is increased. 3) T or F A lower p-value will provide better evidence in favor of rejecting the null hypothesis. 4) T or F The number of ways two people can be chosen from a group of five is: 5 C 2 = 2 5 = 20 5) T or F If returns on two investments are uncorrelated, ρ = 0, it is theoretically possible to form a portfolio with no risk (standard deviation and variance of the returns on the portfolio = 0). 6) T or F The distribution of a sample mean of a NON-normal population with finite standard deviation will approach a normal distribution as the number of observations becomes large enough. 7) T or F The standard deviation of the sum of two random variables is the sum of the two individual standard deviations IF the correlation between them is 0. 8) T or F For a specific “95% confidence interval,” 95% of the population means, μ , are in this interval. 9) T or F Benford’s Law (used to check accuracy of financial documents) implies that the probability of the first digit of numbers in financial documents is equally likely to be any integer from 1 to 9. 10) T or F
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Sp09_Mid2A - EC 41, UCLA Spring 2009 Midterm #2 5/13/09...

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