25. Gestation. For women, pregnancy lasts about 9 months. In other species of animals, the length of time from conception to birth varies. Is there any evidence that the gestation period is related to the animal's lifespan? The rst scatterplot shows Gestation Period (in days) vs. Life Expectancy (in years) for 13 species of mammals. The highlighted point at the far right represents humans. B25 - .._. 506 31. 3?5 .. E ' g 250 ' . " (D I 125 . t _ .1" l||| 20 40 60 80 Life Expectancy {yr} a) For these data, 1' = 0.54, not a very strong relation- ship. Do you think the association would be stronger or weaker if humans were removed? Explain. b) Is there reasonable justification for removing humans from the data set? Explain