measuring populations

Question 1

What is demography?

Answer 1

•Demography is the study of human population with respect to size, composition, spatial distribution, and changes in the population that occur over time.

Question 2

what are the three demographic processes that effect demographics?

Answer 2

1. Fertility (Number of births that occur to an individual or a population)
2. Mortality (Death of an individual or the number of deaths that occur in a population)
3. Migration (The movement of people into or out of a specific geographic area)

Question 3

what is the crude birth rate?

Answer 3

the annual number of live births per 1000 people

Question 4

What is the general fertility rate?

Answer 4

the annual

number of live births per 1000

women of child bearing age

= 15-44

Question 5

what is age-specific fertility rate?

Answer 5

the

annual number of live births per

1000 women in a particular age

group

Question 6

what is the proble with using crude fertility rates?

Answer 6

using crude birth rates it’s not possible to know whether differences between populations are due to differences in fertility or age structure of the population

• there are a lot of people in the childbearing years

Question 7

what is the total period fertility rate?

Answer 7

provides a method to compare fertility between different populations

•The TPFR is a hypothetical measure obtained by adding the age specific fertility rates for the age groups from 15 to 49 years

–The Total Period Fertility Rate (TPFR) is the projected number of children a woman would have if she experienced the current rate of childbearing throughout her reproductive years

–A value of 2.1 is the level at which the population would replace itself in the long run, ignoring migration. The replacement level TPFR is 2.1, not 2.0, to allow for loss through death of children before reaching reproductive age.

Question 8

what is the total period fertility rate of a ‘stable’ population?

Answer 8

2.1 is the level at which the population would replace itself in the long run, ignoring migration

Question 9

what is the ‘age dependency ratio, young’?

Answer 9

is the ratio of younger dependents - people younger than 15 - to the working-age population - those ages 15-64. Calculated as the proportion of dependents per 100 working-age

Question 10

what is the ‘age dependency ratio, old’?

Answer 10

•Age dependency ratio, old, is the ratio of older dependents - people older than 64 - to the working-age population–those ages 15-64. Calculated as the proportion of dependents per 100 working-age population.

Question 11

what does a high dependency ratio mean?

Answer 11

means there is a lower proportion of working age people to support those in the dependent age groups.

Question 12

what does the term ‘ population explosion’ refer to?

Answer 12

•Expressions used to describe the 20th century worldwide trend of rapid population growth, resulting from a world birth rate much higher than the world death rate.

Question 13

is a ‘stable population’ the same as a ‘zero population growth’ ?

Answer 13

• Stable Population A population with an unchanging rate of growth and an unchanging age composition as a result of age-specific birth and death rates that have remained constant over a sufficient period of time.
• Zero Population Growth A population in equilibrium, with a growth rate of zero, achieved when births plus immigration equal deaths plus emigration.

Question 14

as a country slows in population grwoth - the pyrimidal shape will become what shape?

Answer 14

c. become more rectangular

Question 15

what does a population pyramid not give you infromation about?

Answer 15

life expectency