what are the main demerits of random sampling ?
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It is not suitable in case of small sampling where the size of the sample to be drawn is very small for in that case the laws of statistical regularity and inertia of large numbers will not operate and the chance of leach item of the universe being included in the sample will not remain the same .
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Random samples are the best method of selecting your sample from the population of interest. The advantages are that your sample should represent the target population and eliminate sampling bias. The disadvantage is that it is very difficult to achieve (i.e. time, effort and money).It is not suitable in case of small sampling where the size of the sample to be drawn is very small for in that case the laws of statistical regularity and inertia of large numbers will not operate and the chance of leach item of the universe being included in the sample will not remain the same
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