To distinguish between primary data and secondary data, that are two important data source mentioned in research methodology. Primary and secondary data are available everywhere arround researchers divided data source into two parts i.e. primary data and secondary data.

Primary data means those source of data which never taken before by anyone for doing problem solution in analysis work. Primary data called as first hand data and also primary data are considered more realistic and correct data.

Secondary data means that type of data source which was already taken by someone according to his purpose of analysis and applied various types of statistical treatment over collected data to derive favourable results for his research. Secondary data called as published data. Secondary data source are less reliability and not very accurate in comparison to primary data source.