Quantitative refers to the systematic investigation of phenomena by gathering quantifiable data and performing statistical, mathematical, or computational techniques. This approach is widely used in fields such as Economics, Psychology, and Sociology to derive insights and make predictions based on numerical data. By employing various methods like surveys, experiments, and observational studies, researchers can analyze trends and relationships within the data. The results often lead to actionable conclusions that can influence decision-making in business, healthcare, and public policy, making quantitative analysis a vital tool in modern research.