Sample Selection Bias

Sample selection bias occurs when the participants included in a study or survey do not represent the larger population well. This can happen if certain groups are overrepresented or underrepresented, leading to skewed results. For example, if a survey about college students only includes those at prestigious universities, it may not accurately reflect the experiences of all college students. This bias can result in misleading conclusions and affect decision-making based on faulty data, undermining the validity of the research. Recognizing and addressing sample selection bias is crucial for reliable outcomes.