Large well-defined groups {population, society} have characteristic average values. Populations have numbers of people in categories.
Societies regularly enumerate population-member characteristics {census}|. Census counting uses geographic areas {census tract}.
Populations can change to new characteristic distributions {demographic transition}. For example, primitive societies can experience population growth as better public health lowers death rate, and later experience population decline as birth rate falls when need and time for children wanes.
Populations have properties {population statistics}. Populations have number of people at age ranges, shown in population pyramid.
Populations have average age at death {life expectancy}.
Populations have number of people per square area {population density, society}.
Populations have ratio of males to females {sex ratio, population}.
If survival chance {chance of survival} {survival chance} at an age is half, half of population born in year reach that age.
Populations have death rates of children 0 to 1 year old per number of people {infant mortality rate}.
Populations have death rates from giving birth {maternal mortality rate}.
Populations have incidence of disease per 100,000 people {morbidity}|.
Populations have death rates {mortality}|.
Populations have deaths of children 0 to 1 month old {neonatal mortality rate}.
Populations have potential birth rates {fecundity}|. Greater numbers of eggs and sperm released or better mating methods can increase fecundity.
Populations have birth rates {fertility}|.
Number of children under age, per woman aged 15 to 44, times 1000 {fertility ratio} is greatest for farmers, lowest for city, and greater for lower classes.
Populations increase at annual rates {growth rate}.
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0225