OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1979 · 13 citations · 0 references
Public HealthBiostatisticsEnvironmental SciencesAir PollutionStatistical ModelingStatisticsAir PollutantsAir Pollution ModelingAir QualityAmbient Air QualityCarbon MonoxideEnvironmental Data AnalysisAir Quality Data AnalysisAir Quality ModelingAmbient Air Quality ModelingAmbient Carbon Monoxide MonitoringCarbon Monoxide MeasurementCarbon Monoxide ModelingStratified SamplingUrban Air Quality Modeling
A stratified sample consisting of 11 data sets from an original list of 166 CO air-quality data sets in SAROAD was selected as a national crossection of observed U.S. CO concentrations, along with a longitudinal group of data sets from a single air-monitoring station. The adequacy of the 2-parameter lognormal probability model (LN2) was tested using these data. A special-purpose computer program was developed for calculating the parameters of the LN2 model using four different techniques: (1) direct method of moments; (2) Larsen's method of fractiles; (3) maximum likelihood estimation (MLE) for grouped data using an MLE approximation technique; and (4) MLE for grouped data using computer optimization.