Pollsters who use probability sampling identify representative samples of the public by trying to ensure that each individual has an equal chance of being surveyed.
What is sampling?
- When you're doing research on a group of people, it's rarely possible to collect data from everyone in that group. Instead, you select a sample. A sample is a group of individuals who will actually participate in the research.
- In order to draw valid conclusions from your results, you must carefully decide how you select a sample that is representative of the group as a whole.
- There are two types of sampling methods:
- Probability sampling involves random selection, which allows you to make strong statistical inferences about the entire group.
- Non-probability sampling involves non-random selection based on convenience or other criteria, allowing you to easily collect data.
To learn more about sampling, refer to:
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