The data in the Animals file on the book’s website holds observations on the average longevity (in years) and gestational period (in days) for a variety of animals. Exercise 3.52 showed the scatter plot together with the regression equation with intercept 6.29 and slope 0.045 and an r² value of 0.73.
a. Interpret the slope.
b. A leopard has a gestational period of about 98 days. What is its predicted average longevity?
c. Interpret the value of r².
d. Show that extrapolating from animals to humans (with gestational period of about 40 weeks) grossly underestimates average human longevity.