Population
This page of disambiguation lists the subjects and articles with the same title. In descriptive statistics , a population is an overall finish of objects (the individual or statistical units ) which is doing a study and one that corresponds to one or more common characteristics. We can also talk of a population of nuts produced in a factory unit.
In mathematical statistics , to use the concept of probability the population is assumed to be infinite. Under these conditions, the sample is defined as a set of random variables whose values are observed achievements.
A set of individuals of the same species living perpetuating itself in a given area is a biological population and the scientific discipline which makes the study is the population biology , a field of study that involved both the ecology ( population dynamics , demography , behavioral ecology ...), the population genetics and evolutionary biology.
Human populations are studied by demography , the sociology and geography human.
The description of the populations can be done:
- Using variables called descriptors (these concern the size , age, birth rates , sex ratio ...).
- By genetics (estimated gene frequency)
- By the dynamics ( birth , death , decay ...)
Is assigned to a piece of territory, a capacity ( carrying capacity ) which limits the growth of the population. Some observers of human societies believe that the concept of capacity must also be applied to human populations, and that uncontrolled growth of human population could lead to a Malthusian catastrophe. Other experts are opposed, they categorically that argument ...
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