Types and sources of data

 Data may be obtain from various sources.It's difficult to specify all sources of data.However,in general,it is classified into two groups :

I.e.

a)primary sources

b)secondary sources

a)primary sources

      The source of data which is gathered by direct observation of researcher is called primary sources of data collection.these data are original and is the first hand data.

These data are achieved by eyewithness. These are reported by an actual observer or participants in an event.these data have not been precisely collected or assembled for any other known project. Primary data are those data can be collected through interviews, observation or experiments.

b)secondary sources:

    Secondary sources are those,which is already gather by others.in these sources the researcher is not eyewitness.The first hand information is collection by someone else for some other purpose.the sources of secondary data can be divided into two groups. I.e

1) External

2)internal

 If any research is carried out by any company or organization, then certain data can be achieved from within the company.In other case the company itself is a source and is referred to as internal sources. Those data include staff record,financial record,internally generated research outcome .External source are the sources outside the company.such source include books,periodicals,published, reports and computer data bank.