Published: Jan 2000
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DATA QUALITY ASSESSMENT (DQA) is a scientific and statistical process that determines whether environmental data are of the right type, quality, and quantity to support a decision. The DQA process consists of five steps that parallel the activities of a statistician analyzing a data set for the first time. However, the DQA process makes use of statistical and graphical tools that non-statisticians can apply to data sets [1-4].