The dataset body temp on the companion website gives age in years and body temperature in degrees Fahrenheit for 100 blood donors ranging in age from 17 to 84 years old. The regression equation is = 98.6 - 0.0138x.
a. In the regression relationship shown, which variable is the response variable (y) and which is the explanatory variable (x)?
b. What is the predicted body temperature for someone who is 50 years old?
c. One of the donors was 50 years old and had a body temperature of 97.6°. What is the residual for this person? Explain what the residual tells you about this person's body temperature in comparison to the average body temperature for someone his age.