Concept:
Sampling methods are used in research to select a subset of a population. The goal is to obtain a representative sample while minimizing bias.
Step 1: Understanding the key condition.
The question specifies that
every member of the population has an equal chance of selection.
Step 2: Identifying the correct sampling method.
This condition is the defining feature of
Random Sampling (also called Simple Random Sampling), where each individual has an equal probability of being chosen.
Step 3: Eliminating incorrect options.
- Stratified Sampling divides the population into subgroups before sampling.
- Systematic Sampling selects every \(n^{th}\) unit.
- Purposive Sampling is based on the researcher’s judgment.
Conclusion:
Thus, the correct answer is
Random Sampling.