HW_11_12_SOL

HW_11_12_SOL - ECO220Y Homework Lectures 11 12 SOLUTIONS(1...

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Page 1 of 2 ECO220Y: Homework, Lectures 11 & 12 – SOLUTIONS (1) In 2007 \$1 CAN \$0.9 U.S., which means that we must multiply X and Y by 0.9. [You may use the most recent exchange rate.] Use the Laws of Expectation and Variance to get reported statistics in U.S. dollars. Additional statistic requested: 9 . 72 ) 90 ( ) 9 . 0 ( 5 . 13 \$ 15 * 9 . 0 8 . 10 \$ 12 * 9 . 0 54 \$ 60 * 9 . 0 4 . 32 \$ 36 * 9 . 0 2 XY Y X s s s Y X 09 . 21 69 . 444 69 . 444 ) 90 )( 9 . 0 )( 9 . 0 ( 2 15 ) 9 . 0 ( 12 ) 9 . 0 ( ] , [ ) 9 . 0 )( 9 . 0 ( 2 ] [ ) 9 . 0 ( ] [ ) 9 . 0 ( ] 9 . 0 9 . 0 [ 2 2 2 2 2 2 sd Y X COV Y V X V Y X V The standard deviation of the difference between X and Y measured in U.S. dollars is \$21.09. (2) Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- X | 10 10 3.990823 3.9 16.8 X Z 16.8 1.7 8.7 -0.3 5.7 -1.1 13.7 0.9 11.5 0.4 3.9 -1.5 12.6 0.7 10.1 0 11 0.3 6

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This note was uploaded on 03/01/2011 for the course ECON 220 taught by Professor Tanaka during the Spring '11 term at University of Toronto.

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HW_11_12_SOL - ECO220Y Homework Lectures 11 12 SOLUTIONS(1...

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