what is aggregation bias
Confidence votes 102. Aggregation bias is, generally, the incorrect assumption that what is true about the group is true about the individual (also known as the ecological fallacy).For example, children from poor families on average perform worse in school than children from wealthier families.onfidence votes 102. Aggregation bias is, generally, the incorrect assumption that what is true about the group is true about the individual (also known as the ecological fallacy).