demography Flashcards
what are the sources of population data ?
- registries of vital data
- household surveys
- census
what information do registries of vital data contain ?
- national birth and death registries
- socio-demographics
- health information
what is the best system to use for fertility, mortality, life expectancy and cause of death statistics ?
registries of vital data
what are household surveys ?
collects information from only a portion of a population of interest
what are the objectives of household surveys ?
- collecting detailed information about the phenomenon under consideration
- determines characteristics about a population using a representative sample
what is a census ?
an enumeration of the population, recording the identity of all persons in every residence at a specified time
how often is a census done ?
usually every 10 years
who carries out a census in Egypt ?
CAPMAS
what are the two census approaches ?
de facto developing
de hure
what is the advantage of using the de facto method ?
easy to conduct
avoid the problem of defining a place of residence
what is the advantage of using the de jure method ?
reflects the actual distribution of the population
which method of census is used in egypt ?
de facto
what is the difference between census and a survey ?
census is done every 10 years and targets the entire population
whilst a survey can be done at any time and works on a selected sample or subgroup
what is the estimated population ?
the number of population in any of the inter census years
what are the methods used to estimate the population size ?
natural increase method
arithmetic method
graphic method
geometric method
how is the population size estimated using the natural increase method ?
the last census population is added to the difference between the live births and deaths
how is the population size estimated using the arithmetic method ?
by calculating the mean increase in population
how is the graphic method used to estimate the population size ?
each years census is plotted on a graph and a are connected by a straight line that is then extended to predict the next population size
which of the methods of predicting population size if the most accurate ?
geometric method
what are the methods of measuring population change ?
rate of natural increase
growth rate
how is the rate of natural increase calculated ?
birth rate-death rate
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10
how is the growth rate calculated ?
r = ( b-d)+(i-e)
expressed as per 1000 people
what are the stages of demographic transition ?
stage 1 stage 2 stage 3 stage 4 stage 5
what does stage 1 in demographic transition describe ?
both birth rate and death rate are high , RNI is low
what doe stage 2 in demographic transitions describe ?
rapid drop in death rates but birth rates remain high so the population is increasing in size
what does stage 3 in demographic transition describe ?
decline in birth rate along with decline in death rate which stabilizes the population
what does stage 4 in demographic transition describe ?
birth and death rates are both low so the RNI approaches 0
what does stage 5 in demographic transition describe ?
higher death rates than birth rates causing the population to shrink
if the population is shrinking what stage of demographic transition is it a t ?
stage 5
which stage is considered high stationary ?
stage 1
which stage is early expanding ?
stage 2
which stage is late exapnding ?
stage 3
which stage is low stationary ?
stage 4
what does the population structure mainly describe ?
the age and sex composition of the population
what does the median age of a population mean ?
is the age at which half of the population is older and half is younger
what does the age dependency ratio describe ?
the ratio of persons in the dependent ages to those at the working age
what is the formula for the age dependency ratio ?
population under 15 + pop over 64
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population aged 15-64
all times 100
what does the age dependency ratio represents ?
the economic burden the working age groups are carrying
what information does a population pyramid provide ?
percentage of men and women in each age group in a total population
what are the characteristics of a population pyramid ?
- the sum of all age-sex groups in the entire population pyramid equals 100%
- the bottom bar represents the population below 5 years of age
- the top bar shows the oldest of the population
what does the base width of a population pyramid indicate ?
the proportion of the young age groups
what does the top width of the population pyramid indicate ?
the proportion of the elderly
what does the height of a population pyramid indicate ?
average duration of life expectancy
what does the symmetry of the population pyramid indicate ?
the similarity or differences in the proportion of males and females in the different age groups
what do the sides of the population pyramid indicates?
- smooth, depression - death, emigration
2 .bulging - immigration
what are the three types of population pyramids ?
expansive population
constrictive population
stationary population
what is the age range for each bar in a population pyramid ?
5 years
what type of population pyramid would a developed european country have ?
stationary population
what type of population pyramid would countries in their transition phase have ?
constrictive population
what type of population pyramid would a developing country have ?
expansive population
