Judgement Sampling


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Judgement Sampling

The main characteristic of judgment sampling is that units or elements in the population are purposively selected It is because of this that judgment samples are also called purposive samples Since the process of selection is not based on the random method, a judgment sample is considered to be non-probability sampling

Occasionally it may be desirable to use judgment sampling Thus, an expert may be asked to select a sample of ‘representative’ business firms The reliability of such a sample would depend upon the judgment of the expert The quota sample, discussed earlier, is in a way a judgment sample where the actual selection of units within the earlier fixed quota depends on the interviewer

 

It may be noted that when a small sample of a few units is to be selected, a judgment sample may be more suitable as the errors of judgment are likely to be less than the random errors of a probability sample 16 However, when a large sample is to be selected, the element of bias in the selection could be quite large m the case of a judgment sample Further, it may be costlier than the random sampling


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