Opportunity sample, The researcher studies whoever is willing or available to take part in the study, Quota sample, This is used when there is no sampling frame available, Representative sample, This sample is one which shares the same characteristics of the population under study, Random sample, This sample is where every member of the target population has the same chance of being selected, Sampling frame, This is a list of all the people in the target population, Stratified sample, A sampling frame can be sub-divided and then a sample is taken from each sub-group

sampling and sampling methods

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