Each member of the target population has an equal chance of being selected.
METHOD:
The research writes all the names of the members of the target population on pieces of paper that are the same size. They are folded in half and placed in a hat. The researcher picks out how many needed for the sample size without looking, to prevent bias, and they become the sample.
STRENGTHS
- Provides the best chance of an unbiased sample - high population validity.
WEAKNESSES
- Writing out all the names of the target population can be expensive and time-consuming.
- Can still be unrepresentative (EG: all girls in one group, all boys in another or if people refuse to take part) so a chance of bias.
Comments
No comments have yet been made