title: Environmental statistics revisited: is the mean reliable?
abstract: The sample mean of data collected during critical pollution periods is a biased estimator of the annual mean. The bias can be corrected by weighting techniques, which take into account the measurement dates. The differences with standard calculations become important to characterize the temporal evolution when sampling changes with time. Sound statistical methods are therefore needed.
authors.affiliation: Mines ParisTech, Centre de Géosciences-Géostatistique, Ecole Nationale Supérieure des Mines de Paris, 35, rue saint-Honoré, 77305 Fontainebleau, France. chantal.de_fouquet@mines-paristech.fr
authors.forename: Chantal
authors.initials: C
authors.lastname: de Fouquet
mesh_terms: D003627:Data Interpretation, Statistical; D004784:Environmental Monitoring / Q000706:statistics & numerical data*; D004787:Environmental Pollution / Q000706:statistics & numerical data*