Question: Outliers. The African elephant is much larger than any other mammal in the data set but lies roughly in the overall straight-line pattern. Dolphins, humans, and hippos lie outside the overall pattern. The correlation between body weight and brain weight for the entire data set is r = 0.86.
(a) If we removed the elephant, would this correlation increase or decrease or not change much? Explain your answer.
(b) If we removed dolphins, hippos, and humans, would this correlation increase or decrease or not change much? Explain your answer.