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Definitions

 Deconvolution
Procedure to remove impact (bias) ofmetric uncertaintyon an indicator estimated cumulative distribution or percentiles estimated for target population and sub-populations.
 Discrete random variable
A random variable with a countable number of possible values is called a discrete random variable (ISI).
 Discrete variable
A variable that takes only a finite number of real values. (e.g., 1, 3, 5 and 1,000). OECD Source: Statistics Canada, Educational Resources, Glossary of Statistical Terms.
 Discrete/continuous populations
Discrete populations consist of populations whose ‘parts’ can be identified and listed, such as the population of lakes or wetlands in a region. Alternatively, stream or road networks are often considered continuous. Continuous populations can be converted into discrete populations by the application of specific rules that break the resource into discrete elements. For example, stream networks could be converted into discrete form by identifying unique reaches defined at the network confluences. In general, we treat stream networks as continuous populations.
 Double sampling
A standard form of sample design for industrial inspection purposes. In accordance with the characteristics of a particular plan, two samples are drawn, n1 and n2, and the first sample inspected. The batch can then be accepted or rejected upon the results of this inspection or the second sample be inspected and the decision made upon the combined result. The term has also been used somewhat loosely for what is called multi-phase sampling and the two-stage version of multi-stage sampling. There is a further usage whereby a first sample provides a preliminary estimate of design parameters which govern the size of the second sample to achieve a desired overall result. OECD Source: A Dictionary of Statistical Terms, 5th edition, prepared for the International Statistical Institute by F.H.C. Marriott. Published for the International Statistical Institute by Longman Scientific and Technical.
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