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Statistical analysis of asbestos fibre counts
Author(s) -
Oehlert Gary W.,
Lee Richard J.,
Van Orden Drew
Publication year - 1995
Publication title -
environmetrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.68
H-Index - 58
eISSN - 1099-095X
pISSN - 1180-4009
DOI - 10.1002/env.3170060203
Subject(s) - poisson distribution , statistics , mathematics , negative binomial distribution , population , asbestos , binomial (polynomial) , distribution (mathematics) , medicine , mathematical analysis , materials science , environmental health , metallurgy
We present methods for estimating asbestos fibre concentrations based on the negative binomial distribution for fibre counts. This distribution is preferred to the usual Poisson due to the extra variability encountered in the data. We extend the method to include estimation of the parameters of a log‐normal population of concentrations, and deal with the problem of zero counts. We illustrate the methods on a set of 921 fibre counts from 177 school buildings.