Convenience sampling
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this is a type of non- probability sampling which involves the sample being drawn from people/items that are readily available and convenient. The researcher using such a sample cannot scientifically make generalizations about the total population from this sample because it would not be representative enough. This type of sampling is most useful for pilot testing.
Source:Ian Boxill et al Introduction to Social research,Canoe Press University of The West Indies, Mona, Jamaica (1997), Chapter 4
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