This assignment solution addresses the UN's fundamental principle 5 regarding data sources for statistical purposes, emphasizing quality, timeliness, respondent burden, and cost-effectiveness. It recommends high-quality, timely, and cost-effective data sources that minimize respondent burden. The solution then explores mixed research methods, highlighting the integration of qualitative and quantitative techniques for comprehensive data collection, analysis, and interpretation. The mixed method approach is applied to the Hochschild case study, demonstrating how qualitative data from interviews complements quantitative data, leading to more accurate and valid inferences. The assignment concludes by arguing for the superiority of mixed methods over single methods, due to their ability to incorporate diverse data types and provide richer insights. References to relevant academic literature are also included.