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CONTROL (IN STATISTICS)

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French Equivalent: Contrôle

Definition:
There are two principal ways in which this term is used in statistics.

Context:
If a process produces a set of data under what are essentially the same conditions and the internal variations are found to be random, then the process is said to be statistically under control. The separate observations are, in fact equivalent to random drawings from a population distributed according to some fixed probability law.

The second usage concerns experimentation for the testing of a new method, process or factor against an accepted standard. That part of the test which involves the standard of comparison is known as the control.

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.

Statistical Theme: Methodological information (metadata)

Created on Sunday, May 19, 2002

Last updated on Monday, March 03, 2003