Test_1_2007 - 2 Let X Y and Z be random variables Consider...

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Department of Economics Professor Dale J. Poirier University of California, Irvine October 30, 2007 MIDTERM EXAM ECON 220A Statistics and Econometrics I (open book) Directions : You must answer each of the following questions. Points (out of 100) are allocated as noted to the left of each question. Allocate your time according to these points. To receive any partial credit, you must show your work. Results from the text need not be reproduced in detail - you can merely cite the source. (10) 1. Consider a random variable X defined by Y = ln(X), where E(Y) = 0. Is E(X) greater than, less than, or equal to one?
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