Collection of statistical data deals with the definition of data, types data and kinds of collecting data.
A sequence of observation in a sample drawn from a population is called as statistical data.
Data which is collected first, is called as raw data or regrouped data or ungrouped data .
Data which is organized into groups, that is into a frequency distribution is called as Grouped data .
Difference between collection of statistical data:
|Primary data are always true as it is collected by the researcher.||Secondary data is lacking originality. The investigator makes use of the data collected by other agencies.|
|Suitability of the primary data will be always positive because it is being collected systematically.||Secondary data may or may not fit the objects of enquiry.|
|Primary data are costly and it will take more time consumption.||Secondary data are more cheaper.|
Data is one of the most important and vital aspect of any research studies. The data may be collected for a whole population or for a small group called sample. There are two types in collection of statistical data.
Methods of collecting primary data:
We can collect the primary data through
2. Secondary data: Secondary data is the data collected by another source. The secondary data is not pure as it might have undergone some statistical treatment. Secondary data tends to be readily available.
Methods of collecting secondary data: