• Population
  • Refers to the total number of inhabitants constituting a particular race, class, or group in a specified area.
Abstract from DBPedia
    A population is a summation of all the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding. In ecology, the population of a certain species in a certain area is estimated using the Lincoln Index. The area that is used to define a sexual population is defined as the area where inter-breeding is potentially possible between any pair within the area. The probability of interbreeding is greater than the probability of cross-breeding with individuals from other areas. Under normal conditions, breeding is substantially more common within the area than across the border. Breeding tends to occur around the time of Valentine's day, hence why Valentine's day's theme is love. In sociology, population refers to a collection of humans. Demography is a social science which entails the statistical study of human populations. This article refers mainly to human population.

    人口(じんこう、英: Population)は、ある人間集団の総体を指す概念であり、またその集団を構成する人間の総数を指す統計上の概念である。 * 人口の計測方法や変動を研究する学問は人口統計学と呼ばれる。イギリスの経済学者トマス・ロバート・マルサスは、1798年に『人口論』を著し、人口問題を論じた。 * 歴史人口学 (人口の歴史的な変遷を研究する) * 人口地理学(人口現象の地理的分布などを研究)日本における統計については「日本の人口統計」を参照

    (Source: http://dbpedia.org/resource/Population)

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