Discuss the different methods of collecting data along with merits and demerits
Answers
Answer:
Merits:
1. Economical:
1. 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:
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:
3. Reliable:If sample is taken judiciously, the results are very reliable and accurate..
4. Organisational Convenience:
4. Organisational Convenience:As samples are taken and the number of units is smaller, the better (Trained) enumerators can be employed by the organisation..
5. More Scientific:
5. More Scientific:According to Prof R.A. Fisher, “The sample technique has four important advantages over census technique of data collection. They are Speed, Economy, Adaptability and Scientific approach.”
Demerits:
1. Absence of Being Representative:
1. Absence of Being Representative:Methods, such as purposive sampling may not provide a sample, that is representative..
2. Wrong Conclusion:
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:
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:
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..
5. Inherent defects:
5. Inherent defects:The results which are achieved though the analysis of sampling data may not be accurate as this method have inherent defects. There is not even a single method of sampling which has no demerit..
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