What is the main purpose of using probability sampling methods?

The main purpose of using probability sampling methods is to enhance the integrity and reliability of the sample. Probability sampling ensures that every individual in the population has a known and non-zero chance of being selected. This method helps to create a representative sample that mirrors the characteristics of the larger population, which allows for more accurate generalizations and conclusions to be drawn from the research findings.

By employing probability sampling, researchers can minimize biases that may arise from the selection process, leading to more valid and trustworthy results. Such sampling methods bolster the study's external validity, making it more likely that the results will hold true for the broader population, rather than being specific to a conveniently selected or biased group.