The dataset body temp on the companion website includes sex, age, and body temperature for 100 blood donors who ranged in age from 17 to 84.
a. Create a scatter plot of body temperature (y) and age (x) using different symbols for men and women. Is there an obvious difference in the relationship between age and body temperature for men and women? Explain.
b. Find the regression equations relating body temperature and age for the men and the women separately. Compare the two equations. Do they indicate that the relationship between the two variables is similar for men and for women? Explain.