Summary

Sampling is the process of selecting the individuals who will provide the data required in a survey. The term 'sample' is defined and reasons for its use in research are given. The main techniques of sample selection are discussed: random sampling and its variants, quota sampling and judgement sampling. The size of the sample needed is shown to be dependent on factors of population variance, required confidence levels and limits of accuracy, allowance for non-response and subgroup analysis requirements.

Online Survey Champion

Online Survey Champion

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