Profile Details

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Hire Mariagrazia Z.

United Kingdom

USD 135 /hr

Freelance Statistician & Data Consultant | Expert in R, Statistical Modelling & Data Analysis

Profile Summary

I am a statistician and data consultant with over 10 years of experience analysing and interpreting data for research, policy and business projects with meaningful social and practical impact. What I enjoy most about my work is helping people make sense of complexity. I like being a “translator” between the technical language of statistics and the practical questions that researchers and organisations are trying to answer, turning numbers into evidence that is clear, rigorous and genuinely useful. I can help with: * Statistical analysis and interpretation * Statistical modelling in R * Study design and methodological advice * Regression, multilevel and survival analysis * Data visualisation and reporting * Reproducible analytical workflows * Statistical review and support with interpreting and communicating results * Tailored analytical solutions for research and decision-making Over the years, I have worked with researchers, universities, charities, public institutions and businesses across a wide range of disciplines. For five years, I worked as a Senior Statistical Consultant at the University of Oxford, supporting projects from the initial research question and choice of methodology through to analysis, interpretation and communication of findings. I believe that good statistical consultancy is not only about choosing the right method. Empathy, active listening and collaboration matter just as much. I take the time to understand the question behind the question: what you are really trying to find out, why it matters, and how the analysis can best help you answer it. I am equally comfortable discussing methodology with technical specialists and explaining complex findings to people with little or no statistical background. If you have a project that needs numbers — but above all, meaning — I would be very happy to listen.

Subject Matter Expertise

• ☆ Biostatistics
• ☆ Data Analysis
• ☆ Predictive Modeling & Analytics
• ☆ Data Processing
• ☆ Data Exploration
• ☆ Cluster Analysis
• ☆ Data Visualization
• ☆ Data Manipulation
• ☆ Data Cleaning
• ☆ Statistics
• ☆ Applied Statistics
• ☆ Social Statistics
• ☆ Regression Analysis
• ☆ Multivariate Analysis
• ☆ Nonlinear Regression
• ☆ Correlation Analysis
• ☆ Survey Design
• ☆ Study Design
• ☆ Statistical Review
• ☆ Medical Statistics
• ☆ SQL
• ☆ Excel
• ☆ R
• ☆ Tableau

Services

• Writing
• Research
• Consulting
• Data & AI

Writing Technical Writing, General Proofreading & Editing

Research Feasibility Study, Scientific and Technical Research, Secondary Data Collection

Consulting Scientific and Technical Consulting

Data & AI Predictive Modeling, Statistical Analysis, Data Visualization, Data Cleaning, Data Processing, Data Insights

Work Experience

Senior Statistical Analyst

Civil Service

April 2025 - Present

Senior Statistical Consultant

University of Oxford

April 2020 - March 2025

Statistical programmer

The George Institute

July 2018 - March 2020

Statistician

Contesti srls

December 2014 - June 2018

Education

Statistics for Business Management and Finance

University of Calabria

January 2012 - September 2015

Quantitative methods for Economics and Businsess Administration - MQEGA

University of Calabria

September 2008 - December 2011

Certifications

• Certification details not provided.

Publications

JOURNAL ARTICLE

Mariagrazia Zottoli, Yutong Cai, Anna L. Hansell, Raquel Granell, Marta Blangiardo, Daniela Fecht, John Gulliver, A. John Henderson, Paul Elliott(2020). Prenatal, Early-Life, and Childhood Exposure to Air Pollution and Lung Function: The ALSPAC Cohort . American Journal of Respiratory and Critical Care Medicine. 202. (1). Microsoft.AspNetCore.Mvc.Localization.LocalizedHtmlString 112--123. American Thoracic Society