ex1221 {Sleuth2} | R Documentation |
The rise in abundance of algae in coastal waters is thought to be due to increases in nutrients such as nitrate and other forms of nitrogen. Researchers gathered data to gauge the evidence that nitrates in the discharges of rivers around the world are associated with human population density.
ex1221
A data frame with 42 observations on the following 11 variables.
River
Country
Discharge
Runoff
Area
Density
NO3
Export
Dep
NPrec
Prec
Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.
Cole, J.L., Peierls, B.L., Caraco, N.F. and Pace, M.L. (1993). Nitrogen Loading of Rivers as a Human-driven Process, in McDonnell, M.J. and Pickett, S.T.A. (eds.) Humans as Components of Ecosystems: The Ecology of Subtle Human Effects and Populated Areas, Springer-Verlag.
str(ex1221)