In Non-Probability sampling, what is the difference between Convenience, Judgment or quota samples?

In Non-Probability sampling, what is the difference between Convenience, Judgment or quota samples?



Convenience Sample: the researcher selects the easiest population members from which to obtain information


Judgement Sample: the researcher uses his or her judgment to select population members who are good prospects for accurate information


Quota Samples: The researcher finds and interviews a prescribed number of people in each of several categories.



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Principles of Marketing

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