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**Statistics:**
Scientific method ·
Research methods ·
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Undergraduate statistics courses ·
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Game theory ·
Decision theory

In different statistical disciplines, the **statistical unit** is the source of a random variable. There are different ways to study a unit and different names applied

- We may be interested in a
*unit*because we intend to generalize from observations on a few units to a statistical assembly of units. Opinion polling and survey sampling provide well known examples of this type of research. - We may be interested in the dynamics of a
*unit*, how its observable characteristics change from time to time. Economic studies of business firms provide an example of this type of research. (See dynamic model.) - We may be interested in the internal functioning of a
*unit*which we can characterize as a statistical assembly. This kind of research often involves interference with the unit such as subjecting it to a treatment or even dissection, in some cases. Field experimentation and clinical trials. are examples.

See also: statistical model

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