What aspect does the sample size affect in a research study?

The sample size plays a critical role in determining the representativeness of the sample in a research study. A larger sample size tends to yield a sample that more accurately reflects the characteristics and diversity of the population being studied. This is crucial for generalizing the findings of the research to a broader context. When the sample size is sufficiently large, it decreases the margin of error and reduces the risk of anomalies influencing the results. Conversely, a smaller sample size may lead to skewed or unreliable conclusions as it may not capture the full range of variations within the population. Thus, a larger, well-chosen sample enhances the validity and reliability of the study's findings, ensuring they can be appropriately applied to the population as a whole.