As a statistician and data analyst, I know exactly how you can use data optimally within your business. Based on your objectives, we will plan to reach the right insight. I am available for: Statistical analysis for academic projects. Data science (prediction models, classification). Data analysis and data mining, web scraping of data Data visualization (infographics, dashboards) Advice and coaching data projects Presentations (storytelling, how to present data, how do other businesses use data?) I can help you businesses, agencies, founders, etc. Make sense of data, and build the reporting and insights you want/need. My particular interest is public health, survey data analysis, biostatistics, psychology, ecometrics and medical research. Skills: Expert in using IBM SPSS, SAS, R Studio, python, STATA and Excel for the following missions. - Data mining, and data cleaning. Expert in Statistical Analysis; Correlation analysis, Regression analysis, ANOVA and MANOVA testing, Survival analysis, Factor analysis (EFA and CFA), Cluster analysis and other tests (parametric and non-parametric). Interpretations and writing high quality reports. - Tables, graphs and interpretations in APA format for dissertations and thesis Sample size calculations using SPSS and R. -Statistical modeling - Designing researches and clinical trials as well. Since I believe that good communication is crucial to gaining good outcomes, I am 100% available through Upwork application, please feel free to contact me directly through messages

I am a Senior Data Scientist and Analytics Lead with 5+ years of experience transforming complex data into actionable business insights across healthcare, banking, telecommunications, sports, consulting, and research domains. I hold a Bachelor’s degree in Statistics from the Faculty of Economics and Political Science, Cairo University, and am currently pursuing a Master’s degree in Data Science. My expertise covers the full analytics lifecycle, including business understanding, data collection, cleaning, transformation, statistical analysis, machine learning, visualization, and executive-level reporting. I have extensive experience delivering data-driven solutions using Python, SQL, Power BI, Tableau, Excel, SPSS, R, Stata, EViews, SSIS, SSAS, and SSRS. My work includes predictive modeling, customer analytics, churn prediction, forecasting, segmentation, A/B testing, hypothesis testing, NLP, dashboard development, and business intelligence solutions. Throughout my career, I have helped organizations improve decision-making, optimize operations, increase revenue, and automate reporting through scalable analytics and AI-driven solutions. I also support academic researchers and business clients with statistical analysis, survey research, research methodology, and advanced hypothesis testing. Whether you need data analysis, machine learning, statistical consulting, dashboard development, forecasting, or end-to-end analytics solutions, I can help turn your data into measurable business value.

I am a highly skilled and motivated market research professional with international expertise across a wide variety of innovative and traditional research solutions. With a unique combination of professional experience and advanced training in research, psychology, and linguistics, I deliver full-service research solutions that empower my clients to stand out in their markets. I am well-versed in qualitative methodologies, including in-depth interviews (both in-person and virtual), focus groups, ethnographic research, and diary studies. My qualitative work often delves into consumer motivations and behavioral patterns, using methods such as projective techniques, thematic analysis, and laddering to unearth meaningful insights that drive business impact. On the quantitative side, I have extensive experience with survey design on multiple platforms, including SurveyMonkey, Alchemer, Typeform and aytm, tailoring research frameworks to clients’ unique needs. My background in survey development covers everything from questionnaire crafting to logic design, ensuring efficient data collection and high data quality. I am also proficient in data analysis, using statistical software like SPSS and SAS to perform in-depth analysis, including regression, cluster analysis, and factor analysis. This skillset enables me to translate complex data into actionable insights, often creating bespoke reporting dashboards that clearly communicate findings to stakeholders. With Master’s degrees in Social Psychology and Linguistics (English, French, German, and Russian), I bring a blend of academic rigor, linguistic insight, and practical research experience. This combination allows me to approach each project with a fresh perspective, helping clients turn research insights into competitive advantages. Specializations: concept development and testing, product development and testing, communication, packaging development and evaluation, brand audit, retail and merchandising, ethnographic research, trend research, value research, motivational segmentation, employee research, and more. Clients include: Microsoft, Nokia, LG, Sony Ericsson, Samsung, Philips, Toyota, Citibank, Bayer, Merz, Reckitt Benckiser, Coca-Cola, 7 Days, P&G, BDF, Avon, Shell, Amway, SCJ, Campari, Philip Morris, Unilever, JTI, and Danone.

Hi Everyone! I am a Social Psychologist who is trained in quantitative methods to analyze social/behavioral data. I am also proficient in study design- if you need a way to set up a project in order to best answer your questions of interest, I am here to help! - I am proficient in SPSS, MPlus, and SAS, and am able to analyze data structures via basic multiple regression frameworks up to more advanced HLM and SEM frameworks, latent class/profile analyses, longitudinal analyses, as well as Bayesian methods. -I have roughly 9 years of work designing, conducting, and analyzing data from my own research, this experience is what I will use to help provide you with the help you need. -It is important to me to provide a succinct, streamlined experience for your data needs! -I am also available in all aspects of manuscript creation/production. I am willing to write, edit, or revise any aspect of academic work you may need fast-tracked- I am extremely prompt and focused in the manuscript production process!

Hello, My job is to turn raw data into purified insights. I apply statistics, machine learning and analytic approaches to solve critical business problems. My main function is to help organizations turn their volumes of big data into useful and actionable insights. Skills: statistics, data munging, data visualization, exploratory data analysis, Tools: R, SAS, SPSS, Tableau, Microsoft Excel, SQL, LaTeX, Markdown, R Shiny I pride myself on ensuring that all my work is error-free and completed in the shortest time. I look forward to building a strong long-term relationship with all of my customers.

I provide rigorous statistical architecture and methodological expertise, bridging the gap between academic rigor and applied data science. With over 16 years of experience, 70+ peer-reviewed publications (13,000+ citations), and a background as a Stanford Medical School and Palo Alto VA Postdoc, I serve as a lead statistician and program evaluator. Over the course of my career, I have architected high-level statistical modeling for the US Veterans Health Administration (VHA), the Naval Health Research Center, university research labs, and private corporations. I do not just run basic correlations—I build complex (longitudinal) models that isolate the true, statistically significant signal in your data, ensuring your findings are mathematically transparent and completely defensible. WHO I PARTNER WITH: ➤ Principal Investigators & Academic Institutions: You are leading research that requires flawless methodology. As the author of widely used R packages (compute.es, MAd), I serve as a Methodological co-author and/or lead statistician, handling the complex statistical architecture to ensure your analyses meet the highest standards of peer review. ➤ Biotech, Pharma & Healthcare Organizations: You need to translate raw data into robust Real-World Evidence (RWE) or evaluate program efficacy. I handle data discovery, complex modeling, and build custom, fully automated R/Quarto pipelines that ingest large datasets and auto-generate reproducible, high-quality reports. ➤ Health-Tech & Startups: You have longitudinal user data but lack the scientific infrastructure to understand your intervention's true impact. I engineer the underlying algorithms (mixed-effects models, N-of-1 experimental tracking), and build interactive web dashboards that visualize outcomes instantly. ➤ AI & Data-Driven Startups: You have massive amounts of unstructured qualitative data (user feedback, session transcripts) and need it converted into rigorous, statistically valid metrics. I act as an LLM Integration Architect, writing automated scripts that pass unstructured text through AI APIs to extract thematic schemas with psychometric-level reliability, turning messy data into clean, actionable databases. THE DIFFERENTIATOR: ✔ Scientific Authority: I am a widely published researcher who translates complex stats into clear, strategic directives that executives, grant committees, and scientific reviewers trust. ✔ End-to-End Implementation: I build complete data pipelines—from initial data acquisition and modeling strategy, all the way to automated reports, deployed dashboards, white papers, or peer-reviewed publications. ✔ Mathematical Transparency: Absolutely no "black-box" modeling. I rely purely on deterministic, peer-reviewed statistical architecture. ✔ 100% Top-Rated Success: A proven track record of delivering rigorous, high-level statistical modeling across academia, government, and the private sector. SELECT TESTIMONIALS: ⭐⭐⭐⭐⭐ "Aaron is the best statistician I ever collaborated with in my 20-year research career" -Grace W. | PhD & Assistant Professor ⭐⭐⭐⭐⭐ "Aaron is one of the most skillful statistical consultants that I know and has consulted with our labs for several years" -Christoph F. | PhD & Full Professor TECHNICAL CORE: • Methodology: Predictive modeling, Longitudinal Mixed-Effects Models (LMM), Meta-Analysis, N-of-1 Single-Case Experimental Analytics, Epidemiological Research, Propensity Score Matching, Factor Analysis, Power Simulations. • Infrastructure & Delivery: R, Python, Quarto, Shiny, SAS, SQL, Interactive Dashboards, Power BI / Tableau, LLM API Integration (Claude/OpenAI). • AI & Psychometrics: Automated Qualitative Data Engineering, LLM Thematic Binning, Exploratory/Confirmatory Factor Analysis, Construct Validation. • Statistical Packages: Tidyverse, lme4, metafor, compute.es, MAd. Are you ready to turn your raw data into defensible scientific assets? Please click "Invite to Job" to discuss your project.

You need AI and data systems built right the first time — by a team that understands your business problem before writing a single line of code. That's how we work at pfactorial Technologies. 🏆 161 projects · 100% JSS · 98 ⭐ reviews · Top Rated 🔄 83% client retention · 🤝 100% long-term relationships · 💯 Every client. Every time. Our clients tend to show up in one of three situations: they have data they can't turn into decisions, they have manual processes that need to be automated with AI, or they have a product vision that needs a reliable engineering team to build it properly. We've handled all three. 🎯 What we deliver: 🤖 AI & Generative AI LLM integration — connecting GPT-4o, Claude, and open-source models to your data, documents, and business processes so AI becomes a working part of your operation, not a prototype. RAG systems — retrieval-augmented generation pipelines that give your AI accurate, sourced answers from your own knowledge base instead of generic responses. AI agents — autonomous systems that handle end-to-end workflows, integrate with CRMs, and escalate to humans when needed. AI chatbot development — production-grade conversational AI for customer support, internal knowledge, and sales automation. AI data annotation — structured labelling and data preparation pipelines for training and fine-tuning AI models. 📊 Data Analytics & Machine Learning Predictive analytics — forecasting and modelling systems that give your business a measurable edge in planning and decision-making. Machine learning — classification, regression, anomaly detection, and recommendation models trained on your data and validated before delivery. Data analytics — clean pipelines, structured analysis, and actionable reporting that turn raw data into decisions your team can act on. AI-powered data mining — intelligent pattern finding using ML to surface insights hidden inside large, complex datasets. Python & data science — custom scripts, automation, and ML pipelines built for production environments. ⚙️ Automation & Business Intelligence Workflow automation — eliminating repetitive manual processes through smart Python scripts and AI-assisted pipelines. Automated data extraction — Python scraping pipelines that gather, clean, and process data at scale without manual intervention. ETL pipelines — structured data flows that move, transform, and load your data reliably across systems. Business intelligence — Power BI, Tableau, and Klipfolio dashboards that give executives real-time operational visibility. Power BI — enterprise-grade BI dashboards, KPI systems, and reporting infrastructure built for decision-makers. 🚀 What we've delivered: 💰 $130,000+ Python data extraction and analytics contract — 4,818 hours of production scraping and predictive analytics for a long-term enterprise client. 📊 Microsoft Power BI enterprise system — 1,555 hours building BI infrastructure from the ground up. 🏢 HR Data Analysis and Predictive Modeling — Upwork Enterprise Client. 🏥 RAG-powered AI assistants for healthcare, banking, legal, and retail clients. 🤖 Claude-based customer service agent — CRM, email, and knowledge base integration, 80% queries handled autonomously. 🔍 AI-powered product matching, document Q&A, and intelligent automation systems. ⭐ What our clients say: "Arun and his team have been fantastic to work with. The data visualization they created has been incredibly helpful and has added real value to our team's decision-making process. He communicates clearly, stays organized, and consistently asks thoughtful clarifying questions to ensure everything is done right the first time." "VERY HAPPY with Arun's assistance. He is very thorough and does a great job explaining the issue and providing training documentation. He is very prompt and has great communication. I am pleased to be a repeat customer and would highly recommend Arun and his team." "Arun was a valuable team member with great Python script development skills. His ability to optimize and refine the scrapers has been instrumental in ensuring reliable and efficient data gathering." 🛠️ How we work: We start in Python and SQL to clean and structure data, then use Power BI or Tableau for dashboards. For AI workflows we build with LangChain, OpenAI, and Claude. We validate models in scikit-learn before delivery and use Scrapy and pandas for extraction at scale. 🌍 Industries we serve: Healthcare · Banking · Legal · Retail · Real Estate · Fintech · Construction · HR Analytics · Marine Operations · Enterprise · SaaS ✉️ Need AI, automation, or data analytics built the right way the first time? Message me directly on Upwork. I scope every project personally, respond within 4 hours, and can prioritize urgent work when needed.

As a Freelance Writer with a Ph.D., I welcome opportunities that allow personal and professional growth while advancing my writing abilities in the area of Medical and healthcare sciences. I have published 25 original research articles in high-impact factor journals and over 09 years of experience in academic & technical writing, and statistical analysis. Proficient in SPSS, R, Python, PowerBi, SAS, ArcGIS, G*Power, PAST, Excel & PowerPoint, Minitab. Contact me if you need any kind of statistical analysis, geographical work, or technical mapping on ArcGIS, Qualitative and quantitative statistics for Medical and Social Science questionnaire surveys, Health Economic Modelling and methodology consultations to help with conducting research, and interpretation of results, proofreading, citation, and literature review. We can always discuss how can I help you and your team wish to be a good scientific research data writer.

I am a highly skilled data analyst with expertise in a variety of powerful tools and technologies, including: ✅Python: Experienced in using libraries like Pandas, NumPy, scikit-learn and TensorFlow ✅ Selenium: Proficient in web scraping to automate data extraction from websites. ✅Tableau: Proficient in Tableau, a powerful data visualization tool that allows for intuitive ✅SQL: Proficient in extracting and manipulating data from relational databases. ✅SAS: Well-versed in employing SAS for advanced analytics, statistical modeling. ✅R: Skilled in utilizing R packages for statistical analysis and data visualization. With these tools at my disposal, I excel in analyzing large datasets, identifying trends, patterns, and correlations, and providing data-driven insights and recommendations.

Marie Skłodowska-Curie Postdoctoral Fellow (University of Groningen), PhD in IB (Universitetet i Agder, Norway) and MSc. in Applied Statistics (Universidad de Alcala, Spain). Previously: postdoctoral researcher at the Netherlands Interdisciplinary Demographic Institute of the Royal Netherlands Academy of Arts and Sciences, postdoctoral data scientist (Helmholtz-Zentrum Dresden-Rossendorf, Germany), postdoc consultant for the University of Groningen and the Oxford Poverty and Human Development Initiative (OPHI, Oxford University, see: ophi.org.uk/rolando-gonzales-martinez/), consultant for the United Nations Population Fund (UNFPA). I have 16 years of experience working in data analysis and data science projects with different softwares (MatLab, R, Python, SQL, Eviews, Stata, SmartPLS4, to name a few), in diverse scientific disciplines. I have also published several papers, see my RG profile here: researchgate.net/profile/Rolando-Gonzales-2