NATS 1840 Lecture Notes - Lecture 20: Population Momentum, Industrial Revolution, Mortality Rate
25 Nov 2017
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Document Summary
The earth"s human population grew from 3 billion to 7 billion in about 50 years. using this information, roughly estimate the average growth rate during that same period of time . In a country with a population of 13,700,000, 43,000 babies were born in the past year. A country has a cbr of 19 per thousand, a cdr of 11 per thousand, and a zero net rate of migration. what is this country"s annual growth rate? . In a normal human population, how many children must each woman bear, on average, during her lifetime to just replace the population? . Population change on earth in one year: births - deaths. For most countries, migration rates are small (and can be ignored) population change is: (births + . Crude birth rate: number of live births / 1000 people per year. Countries with highest birth rates: predominantly in africa. Developed countries: have comparatively low birth rates.
