Statistical model

We adopt the position that three basic notions are sufficient to describe all statistical models.

1. We choose a statistical unit which we will observe directly. Multiple observations of the same unit over time is called [longitudinal research]?. Observations of a variety of [statistical attributes]? is a common way of studying relationships among the attributes of a single unit.
2. We may really be interested in a [statistical ensemble]? (or set) of similar units rather than in any Statistical Unit per se. Survey sampling offers an example of this type of application.
3. Our interest may be focused on a statistical assembly where we examine functional subunits of the statistical unit. Physiology is an example in which we probe the organs which compose the unit. A common model for this type of research is the stimulus-response model.

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