Abstract
This brief note examines the beta distribution as a statistical model for airborne contaminant concentrations, and in particular as a tool to describe occupational exposures. The beta distribution is bounded on both tails and has the flexibility to accommodate skewed data. This is a requirement for any physically consistent model of concentration data. The method described here admits the maximum possible concentration as an upper bound to improve the statistical description. A comparison with the standard lognormal model is illustrated with a data set of naphthalene exposures.
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