Question

Which of the following are the probability sampling method?
A. Random sampling
B. Convenience sampling
C. Stratified sampling
D. Multistage sampling
Choose the correct answer from the options given below:

• A. A, B and D only
• B. A, B, and C only
• C. B, C and D only
• D. A, C and D only

Hint:

To identify probability sampling, look for methods that use random selection (Random, Stratified, Systematic, Cluster, Multistage).
Convenience, Purposive, Quota, and Snowball are non-probability methods.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
In statistics and research methodology, sampling methods are divided into probability and non-probability sampling.
In probability sampling, every element of the population has a known, non-zero chance of being selected, which minimizes selection bias and allows for statistical generalization.

Step 2: Detailed Explanation:
Let us analyze the listed sampling methods:
- A. Random sampling: This is a fundamental probability sampling method.
Every individual in the population has an equal and independent chance of being selected.
- B. Convenience sampling: This is a non-probability sampling method.
Subjects are selected based on their convenient accessibility and proximity to the researcher, rather than through random selection.
- C. Stratified sampling: This is a probability sampling method.
The population is divided into homogeneous subgroups (strata), and random samples are drawn from each stratum.
- D. Multistage sampling: This is a probability sampling method.
Sampling is carried out in successive stages, with primary, secondary, and tertiary units selected randomly at each stage.
Therefore, A, C, and D are probability sampling methods, while B is a non-probability method.

Step 3: Final Answer:
The probability sampling methods from the list are Random sampling, Stratified sampling, and Multistage sampling, corresponding to Option (D).