mixAK (version 5.4)

Acidity: Acidity index of lakes in North-Central Wisconsin

Description

Acidity index measured in a sample of 155 lakes in North-Central Wisconsin.

Crawford et al. (1992) and Crawford (1994) analyzed these data as a mixture of normal distributions on the log-scale. Richardson and Green (1997) used a normal mixture estimated using reversible jump MCMC.

Usage

data(Acidity)

Format

A numeric vector with observed values.

References

Crawford, S. L. (1994). An application of the Laplace method to finite mixture distribution. Journal of the American Statistical Association, 89, 259--267.

Crawford, S. L., DeGroot, M. H., Kadane, J. B., and Small, M. J. (1994). Modeling lake chemistry distributions: Approximate Bayesian methods for estimating a finite mixture model. Technometrics, 34, 441--453.

Richardson, S. and Green, P. J. (1997). On Bayesian analysis of mixtures with unknown number of components (with Discussion). Journal of the Royal Statistical Society, Series B, 59, 731--792.

Examples

data(Acidity)
summary(Acidity)