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Multilevel nested, correlated data often arise in biomedical research. Examples include teeth nested within quadrants in a mouth or students nested within classrooms in schools. In some settings, cluster sizes may be large relative to the number of independent clusters and the degree of correlation may vary across clusters. When cluster sizes are large, fitting marginal regression models using Generalized...
The objective of the study was to examine the effects of five plastic coatings on cleanability of concrete flooring. In the laboratory it is easier to use simplified model soils (dirts) than actual soils present in piggeries. The aim of the study was particularly to examine the correspondence between the cleanability of the surfaces using simple model soils in a radiochemical reference method and...
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