Data collection presentation

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DATA COLLECTION

description

Data collection - Statistical data are a numerical statement of aggregates. Data, generally, are obtained through properly organized statistical inquiries conducted by the investigators. Data can either be from primary or secondary sources.

Transcript of Data collection presentation

Page 1: Data collection presentation

DATACOLLECTION

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Data can be define as the quantitative or qualitative value of a variable (e.g. number, images, words, figures,facts or ideas)

It is a lowest unit of information from which other measurements and analysis can be done.

Data is one of the most important and vital aspect of any research study.

Introduction

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Object and scope of the enquiry. Sources of information. Quantitative expression. Techniques of data collection. Unit of collection.

Factors to be Considered BeforeCollection of Data

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Sources of Data

External sources

Primary data

Secondary data

Internal sources

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Internal sources of Data

o Many institutions and departments have information about their regular functions,for their own internal purposes.

o When those information are used in any survey is called internal sources of data.

o Eg…social welfare socities.

External sources of data

o When information is collected from outside agencies is called external sources of data.

o Such types of data are either primary or secondary.

o This type of information can be collected by census or sampling method by conducting survey.

Internal & External Sources of Data

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Data that has been collected from first-hand experiences is known as primary data.It has more reliable,authentic and not been published anywhere.

Primary data has not been changed or altered by human being,therefore its validity is greater than secondary data.

Primary Data

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Methods of

collecting

primary data

Direct Personal Investigation (i.e. interview

method)

Indirect oral investigation (i.e. through

enumerators)

Investigation through local

reporters questionnaire

Investigation through mailed

questionnaire

Investigation through

observation

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MeritsTargeted issued are

addressed

Data interpretation is better

High accuracy of data

Address as specific research issues

Greater control

Demerits

Evaluated cost

Time consuming

More number of resources are required

Inaccurate feedback

Required lot of skill with labour.

Primary Data

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Secondary data are those that have already been collected by others.

These are usually in journals, periodicals, research publication ,official record etc.

Secondary data may be available in the published or unpublished form. When it is not possible to collect the data by primary method,the investigator go for secondary method.

This data collected for some purpose other than the problem at hand.

Secondary Data

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Published Sources

International

Government

Municipal corporation

Institutional/ commercial

Unpublished sources

Method of collection secondary data

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Merits

Quick and cheap source of data

Wider geographical area

Longer orientation period

Leading to find primary data

Demerits

No fulfill our specific research needs

Poor accuracy

Data are not up to date

Poor accessibility in some cases

Secondary Data

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Primary data

Real time data Sure about sources of data Help to give results/ finding Costly and time consuming

process Avoid biasness of response

data More flexible

Secondary data

Past data Not sure about of sources

of data Refining the problem Cheap and no time

consuming process Can not know in data

biasness or not Less flexible

Difference b/w primary and secondary data

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Kanchan Agrawalhttp://www.ezyshine.com/

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