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Unformatted text preview: where " > 0 and $ > 0. B. Use changeofvariables. C. P(D) = 1  P(D c ) D. Use iterated expectations. 2 (25) 1. Let A and B be two events in a sample space S. Prove P(A 1 B) $ 1  P(A c )  P(B c ). (25) 2. Let X and Y have joint density Find Cov(X, Y). 3. Let X and Y be two random variables such that X * Y = y B(T, y) (i.e., Binomial) and Y $ ( " , * ) (i.e., Beta). (10) (a) Find E(X). (15) (b) Find Var(X). (25) 4. Consider Example 2.4.2 on pp. 4850 of the text. Consider the random variable Z = E(Y 1 * Y 2 ). Find its density function....
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This note was uploaded on 12/12/2010 for the course ECON ECON 220A taught by Professor Dalej.poirier during the Fall '10 term at UC Irvine.
 Fall '10
 DaleJ.POIRIER
 Econometrics

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