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Explain the meaning of sampling Survey. What are the advantage and disadvantages ? |
| Answer» Solution :Sampling methods are the ways to choose people from the population to be considered in a sample survey. Samples can be divided based on following criteria. PROBABILITY samples - In such samples, each population element has a known probability or chance of being chosen for the sample.Merits1. Economical:It is economical, because we have not to collect all data. INSTEAD of getting data from 5000 farmers, we get it from 50-100 only.2. Less Time Consuming:As no of units is only a fraction of the TOTAL universe, time consumed is also a fraction of total time. Number of units is considerably small, hence the time.3. Reliable:If sample is taken judiciously, the results are very reliable and accurate.4. Organisational Convenience:As samples are taken and the number of units is smaller, the better (Trained) enumerators can be employed by the organisation.Demerits1. Absence of Being Representative:Methods, such as purposive sampling may not provide a sample, that is representative.2. Wrong Conclusion:If the sample is not representative, the results will not be correct. These will lead to the wrong conclusions.3. Small Universe:Sometimes universe is so small that proper samples cannot be taken not of it. Number of units are so less.4. Specialised Knowledge:It is a scientific METHOD. Therefore, to get a good and representative sample, one should have special knowledge to get good sample and to perform proper analysis so that reliable RESULT may be achieved. | |