About this opportunity
Overview
Rex is looking for statisticians to help train and evaluate AI models on statistical reasoning and data analysis. In this role, you will design analysis tasks, review AI-generated statistical work, and write the reference answers that models are measured against. Compensation is listed as USD $60–120 per hour, adjusted by country of residence.
What You'll Do
- Design statistical analysis tasks with reference answers, including hypothesis testing, regression, experimental design, and causal inference.
- Review AI-generated analyses for method choice, assumptions, interpretation, and communication of uncertainty.
- Develop and refine statistical and mathematical arguments used in AI evaluation tasks.
- Interpret and summarize complex numerical datasets for model-training scenarios.
- Write rubrics and structured feedback on model outputs.
- Document common statistical misconceptions that models repeat.
- Participate in calibration and review sessions and incorporate feedback to maintain quality consistency.
Requirements
- Master’s degree in statistics or a related field, or 5+ years of professional experience as a statistician or statistical analyst.
- Strong working knowledge of R or Python for statistical analysis.
- Experience with applied analysis on real datasets.
- Excellent written English.
- Ability to work independently, meet deadlines, and operate reliably in a remote setting.
Preferred Qualifications
- Experience training professionals in statistical methods for AI or machine learning.
- Clinical, survey, or econometric analysis experience.
- Experience with causal inference or Bayesian methods.
Legal and Compliance
Submitted content must be lawful and free of confidential, proprietary, or personal data shared without a lawful basis. Rex may verify identity, credentials, ownership, and licensing, and may reject or remove submissions that do not meet requirements. Engagement and payment are subject to successful verification and applicable sanctions, export-control, tax, and employment laws. The contractor agreement will define ownership and licensing terms for delivered work.
