Design, develop, and test surveys and data collection instruments. Determine sampling methods, sample sizes, and survey methodologies. Evaluate survey reliability and validity. Oversee data collection processes and ensure adherence to standards. Clean, validate, and prepare datasets for analysis. Integrate data from multiple sources. Apply statistical techniques such as regression and time-series analysis. Build predictive models and algorithms. Select and justify analytical methodologies. Interpret statistical results and translate them into actionable insights. Prepare technical reports, dashboards, and presentations. Communicate findings to technical and non-technical stakeholders. Conduct data validation and sensitivity analyses. Evaluate model performance and ensure statistical accuracy. Provide methodological advice.