POPULATION METHOD VERSUS SAMPLE ENUMERATION
For any statistical investigation, the basic problem is to obtain adequate and reliable data relating to the particular variable under study. There are two sources of data:
- Population method or complete enumeration.
- The sample method or partial enumeration.
In population method we resort to 100% inspection of the population and enumerate each and every unit of the population. But in the sample method we inspect only selected representative and an adequate fraction of the population. The census method seems to provide more accurate and exact information as compared to sample method. Moreover, it affords more extensive and detailed study. On the contrary, in sample method we make projections about the population on the basis of a part of the population. A properly designed and carefully executed sampling plan yields fairly good results. A good sample selection is the key to the survey research and it allows generalizing the findings, which is the whole purpose of survey research.