Question

Distinguish between sampling and non-sampling methods

Answer 1

Sampling	Non-sampling
1. We take a part (sample) of the information 1. We take every items of the information for studies.	1. We take every items of the information for studies.
2. Inference are drawn from the sample of universe.	2. Inferences are drawn from the data of complete universe.
3. This is the recent method	3. This is an old method
4. Less difficulties are faced because fewer units of the large universe are observed	4. Many difficulties are generally faced when the universe is large.
5. A small number of trained investigators can collect the	5. A large army of investigators may have to be appointed to collect the data
6. It is more scientific	6. It is not so scientific
7. Possible and reliable in such cases.	7. Only census method can be used in certain case such as for counting the population of a country.