She sees an eagle with probability 0.2 during an hour of observation, a jack-rabbit with probability 0.5, and both with probability 0.05.
Recall the ecologist observing eagles and rabbits in Exercises 27 and 28. Find the correlation between the random variables E and J where E = 0 represents seeing no eagle, E = 1 seeing an eagle, J = 0 seeing no jackrabbit, and J = 1 seeing a jackrabbit. What does the result mean?