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

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

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

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

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

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

Copyright Christopher Dougherty 1999–2006. This slideshow may be freely copied for personal use. 26.08.06

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