Question

Which of the following is not a type of non-random sampling?

• A. Convenience sampling
• B. Cluster sampling
• C. Quota sampling
• D. Snowball sampling

Hint:

Non-random sampling techniques include methods like convenience sampling, quota sampling, and snowball sampling, while random sampling techniques include methods like cluster sampling.

Answer 1

The Correct Option is B

Topic: Sampling Techniques in Research
Understanding the Question: Identify which sampling method is "random" (probability-based) rather than "non-random" (non-probability).
Key Formulas and Approach:
Random: Every member has a known, non-zero chance of selection.
Non-Random: Selection is based on researcher judgment or convenience.
Detailed Solution:
Step 1: Evaluate (A) and (C). Convenience and Quota sampling depend on who is available or a subjective "quota." These are non-random.
Step 2: Evaluate (D). Snowball sampling depends on referrals. It is biased and non-random.
Step 3: Evaluate (B). In Cluster Sampling, the population is divided into groups, and clusters are selected at random. It is a formal probability sampling method.
Conclusion: Cluster sampling (B) is a random sampling technique.