This report investigates the roles of quantitative and qualitative research in modern marketing, examining how these methods are applied in data analysis. Quantitative research is crucial for understanding consumer behavior and formulating predictive studies using surveys and predefined criteria. Qualitative research enhances intelligence and trade functioning by identifying industry features. The report also defines correlation and regression as statistical methods for determining the degree of association between variables, while time series analysis uses sequential data to identify patterns and make predictions. Key issues regarding correlation and regression techniques, such as dependency, are discussed, along with the importance of effective data collection methods. The study concludes that both quantitative and qualitative research, along with data analysis techniques, significantly impact accounting and finance by aiding in data evaluation and predicting future corporate situations. Desklib provides access to similar reports and study materials for students.