HW_11_12_SOL - ECO220Y: Homework, Lectures 11 & 12...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
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
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

HW_11_12_SOL - ECO220Y: Homework, Lectures 11 & 12...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online