Gorilla ebola. An ebola virus outbreak in gorillas in the Congo from 2002 to 2003 killed 91 gorillas in 7 ranges. This table list ONSET date relative to the initiation of the outbreak and the number of home ranges separating the gorilla band from the initially infected band (DISTANCE):
DISTANCE ONSET 1 4 3 21 4 33 4 41 4 43 5 46 Data from Bermejo, M., Rodriguez-Teijeiro, J. D., Illera, G., Barroso, A., Vila, C., & Walsh, P. D.
(2006).
Ebola outbreak killed 5000 gorillas, Figure 1A. Science, 314(5805), 1564. Data file: EBOLA.*.

(a) Which variable, DISTANCE or ONSET, is the independent variable in this analysis? Which is the dependent variable?

(b) Create a scatterplot of the data. Interpret what you see.

(c) Calculate correlation coefficient r. Then describe the strength of the association.

(d) What percent of the variance in ONSET is explained by DISTANCE.

(e) Use a regression model to predict how long on average it takes the outbreak to move from one gorilla band to an adjacent band.