Density probability plots show two guesses at the density function of a continuous variable, given a data sample. The first guess is the density function of a specified distribution (e.g., normal, exponential, gamma, etc.) with appropriate parameter values plugged in. The second guess is the...

Identifying patterns in bivariate data on a scatterplot remains a ba- sic statistical problem, with special flavor when both variables are on the same footing. Ideas of double, diagonal, and polar smoothing inspired by Cleveland and McGill’s 1984 paper in the Journal of the American...

This working paper gives a comprehensive explanation of the multivariate technique called correspondence analysis, applied in the context of a large survey of a nation s state of health, in this case the Spanish National Health Survey. It is first shown how correspondence analysis can be used to...

We present maps of the 2008 presidential voting bases on ethnicity, income, and state, and discuss the challenges involved in statistical modeling and the graphical presentation of the results