Which of the following is not a nonrandom sampling technique?

Which of the following is not a nonrandom sampling technique?

(a) Purposive

(b) Quota

(c) Convenience

(d) Cluster

✅ Correct option: (d) Cluster

Explanation:

Cluster sampling is a random sampling method, whereas purposive, quota, and convenience sampling are nonrandom. Hence, option (d) is correct.

10 Related PPSC Facts:

Cluster sampling is random
Used for large populations
Reduces cost
Convenience sampling is nonrandom
Purposive sampling is judgmental
Quota sampling is structured
Random sampling supports inference
Nonrandom limits generalization
Cluster uses groups
Common in surveys