Population data provides vital information for studying human populations and making decisions regarding social and economic issues. It is collected through population censuses, sample surveys, and vital registration. A population census counts all individuals in a defined geographic area to collect demographic and socioeconomic characteristics. It is usually conducted every 10 years and is the primary source of population data in many countries, including Ethiopia's three censuses in 1984, 1994, and 2007. Sample surveys collect data from a sample of the population and can provide more detailed information than censuses. Vital registration continuously records life events like births and deaths from official documents. While valuable sources of data, censuses and surveys still face challenges to data quality from issues like inadequate funding

1. Sources of
Population
Data
Mr.YONAS GEMEDA
March2020
Addis Ababa

2. What is population data?
• Population data is population information,
such as number, age, marital status, births,
and deaths, occupation, religion,
educational status, and other characteristics
of human population.

3. Population data
• Population information is vital for studying
the different aspects of human population.

4. Purpose of population data
• Population information is important for
many reasons. The following are:
• To provide statistical information for
making decisions related to social and
economic affairs.
• To indicates future requirements of the
population in terms of social health,
education, employment and other socio
economic needs.

5. Purpose of Population Data
• To helps policy makers to forecast the needs
of the population and to understand how to
meet them.

6. Methods of Data collection
Population Census
Sample Survey
Vital Registration

7. Population Census
• What is population census?
• Census is usually defined as the total
process of collecting, analyzing, compiling
and publishing demographic, economic and
social data of all persons in a country at
special time

8. Population Census
• It is the official counting of all the people of
a certain geographical area with a well
defined boundary so as to collect socio
economic and demographic information
about the population.

9. Population Census
• Census are the main source of population
data in many countries including Ethiopia.
• The history of census goes back to ancient
times in places such as :
• Rome
• Greece
• Palestine
• India

10. Population Census
• Census provide a wealth of demographic
and socio economic data.
• In Ethiopia, three census have been taken
• 1st in 1984
• 2nd in 1994
• 3rd in 2007
• Census in Ethiopia is conducted every 10
years.

11. Main Features of census
• Government sponsorship
• Defined territory
• Universality
• simultaneity
• Individual units
• Periodicity
• expensiveness

12. Sample Survey
• It collects information only from part of the
whole population.
• They are undertaken to generate socio
economic and demographic data
• Survey are usually undertaken during a
period of transition between two
consecutive censuses

13. Sample Survey
• Sample surveys are also an important source
of population statics in areas where census is
not conducted.
• They are important for gathering data to fill
population information gaps

14. Sample Survey
• As compared to census, sample survey is:
• Less expensive
• Capable of providing very detailed
information
• It can provide better quality of data than
census
• Able to estimate margins of error or the
accuracy of data

15. Vital Registration
• It refers to the continuous registration of
such vital events as births, deaths,
marriages and divorces.
• These events are recorded as they occur.

16. Vital Registration
• Data on vital events are gathered from birth
and death certificates, marriage licenses,
divorce records and other official registers.
• The building up of a reliable vital
registration system is an expensive and
extensive process

17. Vital Registration
• Vital registration can be affected by several
factors including:
• Level of literacy and awareness
• Social custom
• The rural population settlement patterns or
inaccessible

18. Factors Affecting the Quality
of Data
• The gathered information may not be
necessarily be accurate. This is because
there are a number of
• Socio economic
• Culture related problems that affect quality
of the data

19. Some of the problems
• Inadequate financing
• Different method of census
• Inadequate awareness of population
• Double entry

20. Some of the problems
• Neglecting or ignoring certain groups of
people
• False information
• Lack of equal acceptance

21. THANK
YOU!!!!!