Question

Which of the following is a non-probability sampling?

• A. Random sampling
• B. Convenience sampling
• C. Stratified sampling
• D. Multistage sampling

Hint:

If the method uses the word "Random" or "Stratified," it is probability-based. If it is based on "Availability," "Judgment," or "Quotas," it is non-probability.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question asks to distinguish between probability and non-probability sampling methods used in research.

Step 2: Detailed Explanation:

• Probability sampling methods are those where every member of the population has a known, non-zero chance of being selected. Examples include Simple Random (A), Stratified (C), and Multistage (D) sampling.

• Non-probability sampling methods involve selection based on subjective judgment or convenience rather than random chance. The probability of selection is unknown.

• Convenience sampling (B) is a non-probability method where the researcher chooses members of the population who are easiest to reach or most available.

• While convenience sampling is quick and inexpensive, it is prone to bias and the results cannot be generalized to the entire population with statistical confidence.

• Other non-probability methods include purposive sampling, snowball sampling, and quota sampling.

Step 3: Final Answer: Convenience sampling is a non-probability sampling method.