1983 Volume 18 Issue 5 Pages 439-443
Frequency distributions of air pollutant concentrations are analyzed generally by assuming that they are lognormally distributed. However, the concentrations are not always lognormally distributed. The distribution model with good fitness to the observed distributions should be applied to the establishment of the environmental quality standard for regulation.
Hybrid-lognormal distribution is proposed and is validated to be applicable to the distribution of occupational radiation exposure, which is similar to the distribution of air pollutant concentrations.
In this paper, the statistical characteristics of hybrid-lognormal distribution is discussed, and it is shown that hybrid-lognormal distribution can well describe the distributions whose distribution function is between lognormal and normal on a curve paper, and that hybrid-lognormal distribution is applicable to the analysis of frequency distribution of air pollutant concentrations.
