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Christopher Dougherty EC220 - Introduction to econometrics (review chapter) Slideshow: exercise r.13 Original citation: Dougherty, C. (2012) EC220 - Introduction.

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Presentation on theme: "Christopher Dougherty EC220 - Introduction to econometrics (review chapter) Slideshow: exercise r.13 Original citation: Dougherty, C. (2012) EC220 - Introduction."— Presentation transcript:

1 Christopher Dougherty EC220 - Introduction to econometrics (review chapter) Slideshow: exercise r.13 Original citation: Dougherty, C. (2012) EC220 - Introduction to econometrics (review chapter). [Teaching Resource] © 2012 The Author This version available at: Available in LSE Learning Resources Online: May 2012 This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. This license allows the user to remix, tweak, and build upon the work even for commercial purposes, as long as the user credits the author and licenses their new creations under the identical terms.

2 EXERCISE R.13 R.13Let  HT be the correlation between humidity, H, and temperature measured in degrees Fahrenheit, F. Demonstrate that the correlation coefficient is unaffected if temperature is instead measured in degrees Celsius, C. Note: C = 5/9(F – 32). 1

3 EXERCISE R.13 R.13Let  HT be the correlation between humidity, H, and temperature measured in degrees Fahrenheit, F. Demonstrate that the correlation coefficient is unaffected if temperature is instead measured in degrees Celsius, C. Note: C = 5/9(F – 32). We start by noting that 2

4 EXERCISE R.13 3 We start with the definition of the correlation between H and C and substitute for C i – C.

5 EXERCISE R.13 4 The 5/9 terms cancel and we are left with the definition of the correlation between H and F.

6 Copyright Christopher Dougherty 1999–2006. This slideshow may be freely copied for personal use


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