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Discussion

Probability and Non-probability sampling techniques are used to draw a sample of the population under study. Which include

(i) Systematic random sampling
(ii) Stratified random sampling
(iii) Cluster sampling
(iv) Purposive sampling
(v) Quota sampling
Select the correct group of probability sampling techniques by using codes given below :

  • A.(i), (ii), (iii) and (iv)
  • B.(i), (ii) and (iii)
  • C.(i), (ii) and (iv)
  • D.(i), (ii) and (v)

Answer: B

The probability sampling techniques are systematic random sampling, stratified random sampling and cluster sampling, which is (i), (ii) and (iii). Each gives every unit of the population a known chance of being selected.

Purposive sampling and quota sampling are non probability techniques, since the researcher chooses the units by judgement. The options that include (iv) or (v) are therefore wrong.

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