Johnston, Roger G., Schroder, Shayla D., Mallawaaratchy, Rajika (2003), "Statistical Artifacts in the Ratio of Discrete Quantities," Proceedings of the Seventh U.S. Army Conference on Applied Statistics, (Barry A. Bodt, Edward J. Wegman, eds.), ACAS01/JohnstonRoger/JohnstonRoger.presentation.pdf