Introduction
Different research situations require different sampling methods.
Researchers must choose methods carefully based on:
- Research goals
- Population type
- Available resources
Choosing a Method
| Situation | Recommended Method |
|---|---|
| Large population with full list available | Simple Random Sampling |
| Different groups must be represented | Stratified Sampling |
| Limited time and budget | Convenience Sampling |
| Hard-to-find participants | Snowball Sampling |
| Researching specific experts | Purposive Sampling |
Case Study
A researcher wants to study teachers in public and private schools equally.
Best method:
Stratified Sampling
Why?
It ensures both groups are represented.
Common Mistakes
- Using convenience sampling for important national studies
- Choosing samples that are too small
- Ignoring hidden bias