Question: A neuroscientist suspects that low levels of the brain neurotransmitter serotonin may be casually related to aggressive behavior. As a first step toward investigating this hunch, she decided to do a correlative study involving nine rhesus monkeys. The monkeys are observed daily for six months, and the number of aggressive acts are recorded. Serotonin levels in the striatum (a brain region associated with aggression) are also measured once per day for each animal. The number of aggressive acts for each animal is the average for the six months given on a per-day basis. Serotonin levels are also average values over the six month period. The researcher would like to obtain a prediction equation (report it) to use in prediction of aggression with serotonin level as the predictor.

a. Perform the appropriate analysis and provide a graph that summarizes the
relationship between the two variables. (4 points)