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Difference between non-probability sampling and probability sampling
Criteria to select the proper probability sampling to reduce biases.
| Non-probability sampling | Probability sampling |
| Sample selection is based on the subjective judgment of the researcher. | The sample is selected at random. |
| Not everyone has an equal chance to participate. | Everyone in the population has an equal chance of getting selected. |
| The researcher does not consider sampling bias. | Used when sampling bias has to be reduced. |
| The sample does not accurately represent the population. | Used to create an accurate sample. |
| Finding respondents is easy. | Finding the right respondents is not easy. |
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