Question: The wind chill factor depends on wind speed and air temperature. The following data represent the wind speed (in mph) and wind chill factor at

The wind chill factor depends on wind speed and air temperature. The following data represent the wind speed (in mph) and wind chill factor at an air temperature of 15° Fahrenheit.

(a) Draw a scatter diagram of the data treating wind speed as the explanatory variable.
(b) Determine the correlation between wind speed and wind chill factor. Does this imply a linear relation between wind speed and wind chill factor?
(c) Compute the least-squares regression line.
(d) Plot the residuals against the wind speed.
(e) Do you think the least-squares regression line is a good model? Why?

Wind Chill Factor, y Wind Wind Wind Chill Speed, x (mph) Speed, x (mph) Factor, y 12 -22 5 25 -3 -25 10 30 15 -11 35 -27 20 -17

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