Population refers to the group of individuals or entities that are the focus of a research study or investigation. This group can be defined by various characteristics such as age, gender, location, occupation, or any other relevant criteria. Studying populations allows researchers to draw conclusions about the larger group or community from the sample that they are studying. Population research can be applied in a wide range of disciplines including sociology, psychology, public health, and economics. It is essential for understanding social trends, behaviors, and attitudes within different groups of people.