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  2. Population density - Wikipedia

    en.wikipedia.org/wiki/Population_density

    Population density is the number of people per unit of area, usually transcribed as "per square kilometer" or square mile, and which may include or exclude, for example, areas of water or glaciers. Commonly this is calculated for a county , city , country , another territory or the entire world .

  3. Physiological density - Wikipedia

    en.wikipedia.org/wiki/Physiological_density

    The physiological density or real population density is the number of people per unit area of arable land.. A higher physiological density suggests that the available agricultural land is being used by more and may reach its output limit sooner than a country that has a lower physiological density.

  4. Template:Pop density - Wikipedia

    en.wikipedia.org/wiki/Template:Pop_density

    This template converts a population and area to a density. Template parameters [Edit template data] This template prefers inline formatting of parameters. Parameter Description Type Status Number of people 1 no description Example 1600000 Number required Area 2 Numerical value of area Example 240 Number required Unit of area 3 no description Suggested values sqkm km2 mi2 sqmi acres acre ha ...

  5. Natural density - Wikipedia

    en.wikipedia.org/wiki/Natural_density

    A subset A of positive integers has natural density α if the proportion of elements of A among all natural numbers from 1 to n converges to α as n tends to infinity.. More explicitly, if one defines for any natural number n the counting function a(n) as the number of elements of A less than or equal to n, then the natural density of A being α exactly means that [1]

  6. List of countries by arable land density - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Arable density (m² per capita) by country. This is a list of countries ordered by physiological density."Arable land" is defined by the UN's Food and Agriculture Organization, the source of "Arable land (hectares per person)" as land under temporary crops (double-cropped areas are counted once), temporary meadows for mowing or for pasture, land under market or kitchen gardens, and land ...

  7. List of countries and dependencies by population density

    en.wikipedia.org/wiki/List_of_countries_and...

    Population density (people per km 2) by country. This is a list of countries and dependencies ranked by population density, sorted by inhabitants per square kilometre or square mile. The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1.

  8. Number density - Wikipedia

    en.wikipedia.org/wiki/Number_density

    For example, replacing m with q (total charge) and m 0 with q 0 (charge of each object) in the above equation will lead to a correct expression for charge. The number density of solute molecules in a solvent is sometimes called concentration , although usually concentration is expressed as a number of moles per unit volume (and thus called ...

  9. Density estimation - Wikipedia

    en.wikipedia.org/wiki/Density_Estimation

    The unobservable density function is thought of as the density according to which a large population is distributed; the data are usually thought of as a random sample from that population. [1] A variety of approaches to density estimation are used, including Parzen windows and a range of data clustering techniques, including vector quantization.