1921
Volume 13, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645
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Abstract

In many fields of scientific endeavor a careful scrutiny of the situation being investigated may suggest a formalized analytic structure or, as it is usually referred to, a mathematical model, for the description of the given system. To a degree, depending on the complexity of the problem, a model may be thought of as an idealized image constructed upon directly or indirectly observed elements of the system and a set of assumptions encompassing all of its pertinent aspects. A model may be purely deterministic or probabilistic, or it may involve both deterministic and probabilistic elements. Briefly, a deterministic model may be said to lead to a unique prediction of the state of a given system, whereas a probabilistic (or stochastic) model incorporates chance fluctuations of the system and consequently allows for a prediction in terms of a probability statement. Experience indicates that the problem of constructing a plausible model for a biological system or for a population consisting of biological organisms is quite complex.

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/content/journals/10.4269/ajtmh.1964.13.905
1964-11-01
2017-09-22
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