Mammal life spans. Data were collected on life spans (in years) and gestation lengths (in days) for 62 mammals. A scatterplot of life span versus length of gestation is shown below.
(a) What type of an association is apparent between life span and length of gestation?
(b) What type of an association would you expect to see if the axes of the plot were reversed, i.e. if we plotted length of gestation versus life span?
(c) Are life span and length of gestation independent? Explain your reasoning.
