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Which is a non-probability based sampling method ?

  • A.Systematic Sampling
  • B.Stratified Random Sampling
  • C.Quota Sampling
  • D.Simple Random Sampling

Answer: C

Quota sampling is a non-probability sampling method, the third option. In it the interviewer fills fixed quotas of people with given characteristics and chooses the individuals, so a person's chance of being selected is not known. Systematic, stratified random and simple random sampling are all probability methods, as each unit has a known chance of selection set by a random procedure.

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