Refer to the Journal of Biogeography (Dec. 2003) study of ants in Mongolia, presented in Exercise 2.68 (p. 63). Data on annual rainfall, maximum daily temperature, percentage of plant cover, number of ant species, and species diversity index recorded at each of 11 study sites are saved in the ANTS file.
a. Construct a scatter plot to investigate the relationship between annual rainfall and maximum daily temperature. What type of trend (if any) do you detect?
b. Use scatter plots to investigate the relationship that annual rainfall has with each of the other four variables in the data set. Are the other variables positively or negatively related to rainfall?