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Collection of
Data
What is Data?
convey information
describe quantity , quality, facts,
statistics
other basic units of meaning that may
be further interepted.
Data is a collection of discrete values that:
Primary Source
S
O
U
R
C
E
S
O
F
D
A
T
A
Secondary Source
It collects data
by itself
It makes available
which were made
by some other
agency
TYPES OF
DATA
Primary Data
Secondary Data
Obtained by a study specifically designed
They are original in character.
Generated from large number of survey.
to fullfill data needsof the problem.
They are not originally collected but
obtained from published or unpublished
sourses.
METHODS OF
COLLECTING
PRIMARY
DATA
Direct personal interviews
Indirect personal interviews
Information from correspondents
Mailed questionnaries methods
Schedules sent through enumerators
Response is more
encouraging.
More accurate and
interpreting results
are obtained.
We can twist the
question as per our
choice.
Communication
can be adjusted.
Method Merits Demerits
Very costly.
Chances of
personal prejudice
& bias.
Interviewers have
to be trained &
supervised.
Time consuming.
Suitability
Intensive rather
than extensive
field surveys
Direct Personal Interview
Face to face
contact with
persons from
whom the
information is to
be obtained.
Methods
Gaining
information from
3rd parties.
Witness should
be capable of
supplying
necessary
information.
Popular method
in practice.
Merits
Economical in
terms of time, cost
and manpower.
Confidential
information can be
collected.
Unbiased and
reliable
information.
Simple method
Demerits
Accuracy of
information is less.
Leads to doubtful
conclusion due
Suitability
In cases where
indirect sources of
information are
required.
Indirect Oral Interviews
Information
from
correspondents
Method
By arranging local agents in different places to collect
information.
They collect & transmit information to central office.
Final data is processed in central office.
Merits
More reliable data.
Sensitive questions can be avoided.
Questions can be adjusted.
Demerits
Too expensive.
Need large number of enumerators.
Time taking.
Suitability
Used where information is to be obtained at
regular intervals from a wide area.
Mailed
Questionnarie
Method
Method
Interviewers asks questions and gets answers only
through e-mails.
Merits
Easily adopted in wide areas.
Relatively very cheap.
Superior to personal interviews.
Demerits
Can be adopted only where informants are literate.
Uncertainity of response.
Dont know the accuracy.
Suitability
Appropriate in case of extensive surveys.
Methods
Enumerators
contact
informants.
Get replies to
the questions in
schedule.
Fill them in their
own
handwriting.
Merits
Mostly for
illiterates.
Very reliable
information.
Demerits
Depends on
enumerators.
Skill of
interviewers.
Suitability
Popular to
use
Schedules sent through Enumerators
Methods of colleting
Secondary Data
Published
Data
Unpublished
Data
PUBLISHED
SOURCES OF
SECONDARY DATA
Publications of Private Institutes
Publications of Autonomous Institutes
Reports
Semi official Pulications
Official Publications
Reports of committes & commissions
REPORTS &
OFFICIAL
PUBLICATIONS
International Bodies
Publications of centeral government
Publications of state government
Important Reports
1
2
3
4
5
UNPUBLISHED
SOURCES OF
SECONDARY DATA
Some records of
government & private
studies made by
Research institutions
Studies made by
scholars etc.,
They can be used
where necessary
Statisticall material is not
always published
CHOICE BETWEEN
PRIMARY &
SECONDARY DATA
It depends on:
Nature & scope of
enquiry
1.
2. Availability of financial
resources
3.Degree of accuracy
desired.
4.Availability of time &
collecting agency
THANKS
FOR WATCHING

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Collection of Data ...pdf

  • 2. What is Data? convey information describe quantity , quality, facts, statistics other basic units of meaning that may be further interepted. Data is a collection of discrete values that:
  • 3. Primary Source S O U R C E S O F D A T A Secondary Source It collects data by itself It makes available which were made by some other agency
  • 4. TYPES OF DATA Primary Data Secondary Data Obtained by a study specifically designed They are original in character. Generated from large number of survey. to fullfill data needsof the problem. They are not originally collected but obtained from published or unpublished sourses.
  • 5. METHODS OF COLLECTING PRIMARY DATA Direct personal interviews Indirect personal interviews Information from correspondents Mailed questionnaries methods Schedules sent through enumerators
  • 6. Response is more encouraging. More accurate and interpreting results are obtained. We can twist the question as per our choice. Communication can be adjusted. Method Merits Demerits Very costly. Chances of personal prejudice & bias. Interviewers have to be trained & supervised. Time consuming. Suitability Intensive rather than extensive field surveys Direct Personal Interview Face to face contact with persons from whom the information is to be obtained.
  • 7. Methods Gaining information from 3rd parties. Witness should be capable of supplying necessary information. Popular method in practice. Merits Economical in terms of time, cost and manpower. Confidential information can be collected. Unbiased and reliable information. Simple method Demerits Accuracy of information is less. Leads to doubtful conclusion due Suitability In cases where indirect sources of information are required. Indirect Oral Interviews
  • 8. Information from correspondents Method By arranging local agents in different places to collect information. They collect & transmit information to central office. Final data is processed in central office. Merits More reliable data. Sensitive questions can be avoided. Questions can be adjusted. Demerits Too expensive. Need large number of enumerators. Time taking. Suitability Used where information is to be obtained at regular intervals from a wide area.
  • 9. Mailed Questionnarie Method Method Interviewers asks questions and gets answers only through e-mails. Merits Easily adopted in wide areas. Relatively very cheap. Superior to personal interviews. Demerits Can be adopted only where informants are literate. Uncertainity of response. Dont know the accuracy. Suitability Appropriate in case of extensive surveys.
  • 10. Methods Enumerators contact informants. Get replies to the questions in schedule. Fill them in their own handwriting. Merits Mostly for illiterates. Very reliable information. Demerits Depends on enumerators. Skill of interviewers. Suitability Popular to use Schedules sent through Enumerators
  • 11. Methods of colleting Secondary Data Published Data Unpublished Data
  • 12. PUBLISHED SOURCES OF SECONDARY DATA Publications of Private Institutes Publications of Autonomous Institutes Reports Semi official Pulications Official Publications
  • 13. Reports of committes & commissions REPORTS & OFFICIAL PUBLICATIONS International Bodies Publications of centeral government Publications of state government Important Reports 1 2 3 4 5
  • 14. UNPUBLISHED SOURCES OF SECONDARY DATA Some records of government & private studies made by Research institutions Studies made by scholars etc., They can be used where necessary Statisticall material is not always published
  • 15. CHOICE BETWEEN PRIMARY & SECONDARY DATA It depends on: Nature & scope of enquiry 1. 2. Availability of financial resources 3.Degree of accuracy desired. 4.Availability of time & collecting agency