Identify the probability sampling procedures from the following: (A) Quota…
2020
Identify the probability sampling procedures from the following:
(A) Quota sampling
(B) Stratified sampling
(C) Dimensional sampling
(D) Cluster sampling
(E) Systematic sampling
Choose the correct answer from the options given below:
- A.
(A), (B) and (C) only
- B.
(B), (C) and (D) only
- C.
(B), (D) and (E) only
- D.
(C), (D) and (E) only
Attempted by 1 students.
Show answer & explanation
Correct answer: C
Probability (random) sampling means every element of the population has a known, non-zero chance of being selected, and the selection is made by a genuine random mechanism. Non-probability sampling relies on the researcher's judgement or convenience, so selection probabilities are unknown.
Classifying each technique:
(A) Quota sampling - NON-probability. The population is divided into quotas, but units within each quota are picked by convenience/judgement, not at random.
(B) Stratified sampling - PROBABILITY. The population is split into strata and a random sample is drawn from each stratum.
(C) Dimensional sampling - NON-probability. It is a multi-dimensional extension of quota sampling, so selection is still non-random.
(D) Cluster sampling - PROBABILITY. The population is divided into clusters and clusters are selected at random.
(E) Systematic sampling - PROBABILITY. A random starting point is chosen and then every k-th element is selected at a fixed interval.
Therefore the probability sampling procedures are (B) Stratified, (D) Cluster and (E) Systematic - i.e. (B), (D) and (E) only.
Hence the correct answer is (B), (D) and (E) only.