The outcomes in the monitor areas represent annual numbers of individuals who failed to return for an outpatient visit within 30 days of discharge, out of the total number of annual discharges. Monitor 21 here is in the Substance Abuse Psychiatric care. This subsample of a much larger data sets provides information on years 1992 and 1993 for the 159 hospitals in the VA system. This plays the role of a covariate in models for the outcomes.
Interest lies in the relationship of pollutant levels to one or more meteorological variables.
Some data I once collected on asking prices of used Mercedes, classified by several factors. Old Faithful geyser eruptions. A classic data set giving recorded times between consecutive eruptions of the famous Old Faithful hot water geyser in Yellowstone National park. This data is 20 or so years old, but Old Faithful's habits don't change much. This data arises in investigations of the fundamental stochastic nature of electro-physiological communication in nervous systems, at the subcellular level.