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DOUBLE SAMPLING

Statistics Directorate    
French Equivalent: Échantillonnage double

Definition:
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.

Context:
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.

Source Publication:
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.

Cross References:
Multi-phase sampling

Statistical Theme: Methodological information (metadata)

Created on Sunday, May 19, 2002

Last updated on Monday, April 28, 2003