Unformatted text preview: y is conducted. The
questionnaire/Schedule is pre-tested in a pilot survey. A few
among the people from whom actual information is needed are
asked to reply. If they misunderstand a question or find it difficult
to answer or do not like its wordings etc., it is to be altered. Further
it is to be ensured that every questions fetches the desired answer.
Merits and Demerits of primary data:
The collection of data by the method of personal survey is
possible only if the area covered by the investigator is
small. Collection of data by sending the enumerator is
bound to be expensive. Care should be taken twice that
the enumerator record correct information provided by the
Collection of primary data by framing a schedules or
distributing and collecting questionnaires by post is less
expensive and can be completed in shorter time.
Suppose the questions are embarrassing or of complicated
nature or the questions probe into personnel affairs of
individuals, then the schedules may not be filled with
accurate and correct information and hence this method is
The information collected for primary data is mere
reliable than those collected from the secondary data.
3.3.2 Secondary Data:
Secondary data are those data which have been already
collected and analysed by some earlier agency for its own use; and
later the same data are used by a different agency. According to
W.A.Neiswanger, ‘ A primary source is a publication in which the
data are published by the same authority which gathered and
analysed them. A secondary source is a publication, reporting the
data which have been gathered by other authorities and for which
others are responsible’ .
35 Sources of Secondary data:
In most of the studies the investigator finds it impracticable
to collect first-hand information on all related issues and as such he
makes use of the data collected by others. There is a vast amount
of published information from which statistical studies may be
made and fresh statistics are constantly in a state of production.
The sources of secondary data can broadly be classified under two
1. Published source...
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