Questionnaire Website with Statistical Reports

I'm looking for a developer to build a questionnaire-based website that can generate detailed reports based on user responses. The reports must adhere to a strict structure and include statistical calculations using the Friedman and Wilcoxon tests.

Key Requirements:
- Develop a user-friendly questionnaire interface
- Include various question types: scale from 1 to 9, yes or no questions, and comment text boxes
- Collect demographic data: age, gender, and social category
- Implement statistical calculations for both Friedman and Wilcoxon tests
- Generate structured reports based on questionnaire responses
- Ensure the website is secure and data is handled confidentially

Ideal Skills and Experience:
- Strong web development skills with experience in building survey or questionnaire platforms
- Proficiency in statistical analysis and implementing tests like Friedman and Wilcoxon
- Experience with data collection and report generation
- Ability to create a clean, intuitive user interface

If you have the expertise to create a robust questionnaire website with precise reporting capabilities, I'd love to hear from you!