Question

Which of the following are probability sampling methods?
1. Simple random sampling
2. Systematic random sampling
3. Stratified random sampling
4. Purposive sampling

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

Hint:

Probability sampling ensures randomization and reduces selection bias, making it ideal for statistical generalizations.

Answer 1

The Correct Option is B

Probability sampling ensures every population unit has a known, non-zero chance of selection. Methods include:

• Simple random sampling: Each individual has an equal selection chance.
• Systematic random sampling: Individuals are chosen at regular intervals from a list.
• Stratified random sampling: The population is divided into subgroups (strata), with random samples drawn from each.

Purposive sampling, a non-probability method, selects participants based on specific characteristics or judgment, not random assignment.

Therefore, the correct answer is (A), (B), and (C).