population median

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• Median household income in Australia and New Zealand — Median household income is commonly used to measure the relative prosperity of populations in different geographical locations. It divides households into two equal segments with the first half of households earning less than the median household …   Wikipedia

• médian — médian, iane [ medjɑ̃, jan ] adj. et n. f. • 1550 « demi »; médiantXIVe; lat. medianus I ♦ Adj. (1560 anat.; autres emplois 1812) 1 ♦ Qui est situé, placé au milieu. Ligne médiane, plan médian. Anat. Veines, artères médianes. Vermis médian.… …   Encyclopédie Universelle

• Population ageing — or population aging (see English spelling differences) occurs when the median age of a country or region rises. This happens because of rising life expectancy or declining birth rates. Excepting 18 countries termed demographic outliers by the… …   Wikipedia

• population — [ pɔpylasjɔ̃ ] n. f. • populacion mil. XVIIIe; repris de l angl.; 1335 « peuplement » rare; bas lat. populatio, de populus « peuple » 1 ♦ Ensemble des personnes qui habitent un espace, une terre. La population du globe, de la France, d une ville …   Encyclopédie Universelle

• POPULATION (GÉOGRAPHIE DE LA) — L’étude géographique des populations a longtemps été réduite à la description du peuplement, considérée comme une introduction à la géographie humaine. Ce n’est que depuis les années 1950 qu’elle s’est élargie à la totalité de la dimension… …   Encyclopédie Universelle

• Population stratification — is the presence of a systematic difference in allele frequencies between subpopulations in a population possible due to different ancestry. Population stratification is also referred to as population structure. Causes of population stratification …   Wikipedia

• median lethal dose — n LD50 * * * (LD50) the amount of pathogenic bacteria, bacterial toxin, or other poisonous substance required to kill half of a group of uniformly susceptible animals, or the amount of ionizing radiation that will kill half of a large group or… …   Medical dictionary

• Median — This article is about the statistical concept. For other uses, see Median (disambiguation). In probability theory and statistics, a median is described as the numerical value separating the higher half of a sample, a population, or a probability… …   Wikipedia

• Median absolute deviation — In statistics, the median absolute deviation (MAD) is a robust measure of the variability of a univariate sample of quantitative data. It can also refer to the population parameter that is estimated by the MAD calculated from a sample. For a… …   Wikipedia

• Median lethal dose — This article is about the toxicological term. For the album by Mudvayne, see L.D. 50 (album). For other uses, see LD50 (disambiguation). In toxicology, the median lethal dose, LD50 (abbreviation for “Lethal Dose, 50%”), LC50 (Lethal Concentration …   Wikipedia

• Population pyramid — This distribution is named for the frequently pyramidal shape of its graph. A population pyramid, also called an age structure diagram, is a graphical illustration that shows the distribution of various age groups in a population (typically that… …   Wikipedia