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?

Transcribed Image Text:

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