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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