Blog Post #14 - Introduction to Population

November 1st, 2019

Introduction to Population

         Population is the size and distribution of the Earth's human population in certain places. Demography is the social science that studies the statics of the human population. Demographers use different terms to show how the population changes. Rate of Natural Increase (RNI or NIR) is the annual growth rate of a country. Crude Birth Rate (CBR) is the number of births per 1,000 people in that country. Crude Death Rate (CDR) is the number of deaths per 1,000 persons. Demographers are able to find the RNI of a country by subtracting the CBR from the CDR. RNI is important because it gives demographers an idea of how much a country's population is growing. The Demographic Transition is a model that tracks the changes in birth and death rates for a country or region over time. Total Fertility Rate (TFR) is the average number of children born per woman during her reproductive years (ages 15 -45). Life Expectancy is the average number of years a person is expected to live in a country or region. Life expectancy is influenced by health services, nutrition, and sanitation. Infant Mortality Rate (IMR) is the death number of children aged 0-1 years of age. Child Mortality Rate (CMR) is the death number of children aged 0-5 years of age. Young and Old Populations is the proportion of young people (aged 15 and under) compared to the proportion of elders (aged 65 and above) which are usually shown by population pyramids. Population Pyramids are visual representations of a nation's population which often include age and gender. 

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