Sp09_FinalA_EC41_blank

Sp09_FinalA_EC41_blank - EC 41, UCLA Spring 2009 Final Exam...

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EC 41, UCLA Spring 2009 Name (print)________________________________ Final Exam - Version A – 6/8/09 I 9 fixed TA: Name__________________________ & Section Time_____________ - 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 20 True/False (20 points), 10 short answer (30 points) and 10 longer questions (50 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 (1 point each) 1) T or F Flatland is divided into three regions: West, Central, and East. If the unemployment rate in the three regions is 3%, 6%, and 12% respectively, then the unemployment rate in all Flatland is 7% 2) T or F Evaluated at x x = * the standard error of the “estimated mean response for the subpopulation, μ ˆ ” is smaller than the “prediction interval for a future observation y ˆ .” 3) T or F A larger regression slope estimate may be less statistically significant than a smaller slope estimate. 4) T or F The primary benefit of a well-diversified portfolio is that the standard deviation of its return will typically be smaller than that of a less-diversified portfolio. 5) T or F Rejecting Ho when α = .05 provides stronger evidence against Ho than rejecting Ho when α = .01 6) T or F If two assets have identical mean returns and identical standard deviations, it is still possible to benefit by forming a portfolio with both assets, rather then just investing in one of the assets. 7) T or F A 95% confidence interval means that percentage of intervals calculated using this method which contain the true population mean will approach 95% as more and more intervals are calculated. 8) T or F When calculating 95% confidence intervals with a given known population standard deviation and different samples of the same size, the intervals will differ, but their size (or width) will be identical. 9) T or F A particular X > μ 0 may reject H 0 : μ=0 against H a : μ 0; but not against H a : μ >0. 10) T or F A “two-sample t-test” is an example of a “non-parametric test.” 11) T or F In the demand for murder example, cross section data for the U.S. suggested that increased use of capital punishment would reduce murders per capita. 12) T or F Data from a back to back stemplot can be used to perform a regression 13) T or F In a standard OLS regression of Y on X, we assume X is measured without error but that there may be errors in the measurement of Y. 14) T or F An event A and its complement (A C ) can not be independent if P(A) is not equal to zero or one. 15) T or F Each statistic has one true value, but each parameter has a distribution of possible values.
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Sp09_FinalA_EC41_blank - EC 41, UCLA Spring 2009 Final Exam...

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