A representative sample is a subset of a larger population that accurately reflects the characteristics and diversity of the entire group. This sample is carefully selected to ensure that it is a true representation of the population, taking into account factors such as age, gender, race, and other relevant demographics. By studying a representative sample, researchers can make informed conclusions and predictions about the larger population, without having to study every single individual. This method allows for more efficient and accurate research, providing valuable insights and understanding of the population as a whole. In other words, a representative sample is like a microcosm of the larger population, providing a snapshot of its composition and behaviors.