What are the factors does reliability of sampling data depend on?
The reliability of the sampling data means that the characteristics of the universe are fully represented by the sample. It depends mainly on the following factors:
(1) Size of the Sample: Reliability of sampling depends on the size of the sample. If its size is very small, it will fail to represent the population. Accordingly, the conclusions would lack reliability.
(2) Method of Sampling: If the method of sampling is not simple and exhaustive, it will not adequately represent the population. Consequently, the results will not be dependable.
(3) Bias of Correspondents and Enumerators: Personal bias of the correspondents and enumerators should be as less as possible. Otherwise, the reliability of the sampling data is bound to suffer.
(4) Training of Enumerators: Reliability of the sample also depends upon the training of the investigators. If they are not trained to make them expert in their field of investigation, the sample will lack reliability.