Hire the Best Linear Regression Professionals

✔️Expert-Vetted top 1% of Upwork freelancers ✔️Satisfied clients ✔️Fixed price ✔️Unlimited revisions ✔️ Useful insights ✔️Clear explanations ✔️Quality code SEND ME AN UPWORK MESSAGE TO GET A FREE QUOTE ➡️Send me a sample of your data to get an analysis plan and price ➡️Or if you prefer to talk, find out how I can help you with a free 20-minute discovery call SERVICES STATISTICS: 🔹Descriptive statistics 🔹Inferential statistics 🔹Statistical modelling 🔹Hypothesis testing DATA ANALYSIS: 🔹Exploratory data analysis 🔹Data preparation and cleaning 🔹Insight generation 🔹Survey data 🔹Machine learning models 🔹Predictive analytics 🔹Summary analysis and visualization (graphs, reports, presentations, dashboards) CONSULTING & REVIEW: 🔹Review statistical or machine learning models 🔹Performance assessment of existing data science models or products 🔹Develop data science training curriculum and materials 🔹Review or develop data science products, algorithms, processes 🔹Review academic research methods, papers ABOUT ME 🔹Full time freelancer: helping individuals and businesses with their data science problems 🔹Bridge between business and data: integrating your domain knowledge with my data science expertise to produce actionable results 🔹The right tool for your problem: R, Python, SQL, Microsoft Excel, Google Sheets, Snowflake, … 🔹15 years of data science experience: across large UK and US companies and academia 🔹Professionally qualified: Certified Advanced Data Science Professional

DATA SCIENTIST — everything I build, you can verify the math. I deliver transparent, auditable data models where every number can be checked. Specializing in quantitative research, statistical modeling, Data insights and automation. QUANTITATIVE RESEARCH & PORTFOLIO CONSTRUCTION : I build and backtest equities, with live execution and kill switches on Alpaca where needed. Position sizing, risk allocation, rebalancing logic, all of it grounded in the math, not gut feel. Quick example of how I think: a momentum strategy covering 145 stocks was delivering 41% CAGR. Expanding to 245 stocks dropped it to 36%. Counterintuitive. The root cause: New stocks were selected on hot recent momentum, so by entry their cycle was already done. Built a 5-filter Monte Carlo system, tested 700+ parameter combinations, to identify which satellites are early-cycle vs peaked. Result: 43%+ CAGR with lower drawdown than the 145-only baseline. The problem wasn't the strategy. It was the timing of entry. Another example: I built a live MBS (Mortgage-Backed Securities) forecasting and trading system for a fund client, covering 265+ cohort securities across weekly, monthly, and quarterly return horizons. The interesting part wasn't the ML, it was the feature design. Standard technical indicators on bond prices are noise. What actually drives MBS price movements is duration, convexity, prepayment rates, regime variables like curve steepness, VIX, and Fed MBS holdings. Every feature built from first principles, nothing borrowed from a vendor that can't be verified. This is where I spend most of my time. Systematic backtests, portfolio construction, Monte Carlo optimization. No black boxes, no ML hype every output can be checked in a spreadsheet. Not "add more data." Find the actual structure driving returns, and build features that reflect it. DATA SCIENCE & ANALYTICS I've worked across real estate, e-commerce, and financial analytics, usually called in when a team has data but no clear answer yet. I focus on getting to a decision you can act on, not a 40-slide deck. Results worth mentioning: ML automation cut a client's data processing from 286 days to 1 day, after they'd run the same manual process for two years without realizing it was automatable Ad spend attribution model that improved campaign ROI by 25% WHAT MAKES ME DIFFERENT ▸ I show my work. Every model, every analysis, every number comes with the method behind it, so you're never trusting a black box ▸ I'd rather tell you a strategy doesn't hold up than build you something that looks good and fails in real world. ▸ I scope real problems fast: send me what you're working with and I'll tell you within 24 hours if and how I can help

I am a Statistical Consultant and MS Statistics student at UC Davis. I also received a B.S. in Applied Mathematics/Economics and a Minor in Business Analytics from the University of California, Riverside. 🏆 Elite Credibility: My coauthored research has been selected for presentation at premier national conferences, including: 1️⃣ 2025 Association for Public Policy Analysis & Management (APPAM), Seattle, Washington 2️⃣ 2025 Population Association of America (PAA), Washington, D.C. 📈 Specialized Statistical Services: I leverage R, Stata, and Python to solve complex causal and predictive problems: ✅ Descriptive Regression Analysis: Linear/nonlinear regression, probability modeling (LPM, logistic), ANOVA (One-Way, Two-way, Random / Fixed / Mixed Effects) ✅ Causal Inference: Difference-in-Differences (DiD), Instrumental Variables (IV), and Panel Data (Random / Fixed / Mixed Effects) ✅ Predictive Modeling: Machine Learning (Gradient Boosted Trees, Random Forest, KNN) ✅ Survey Methodology: Expert population weighting, clustering, and post-stratification ✅ Statistical Tests: A/B tests, T-tests, Chi-squared Tests, Hausman test, etc. Some Projects: 1️⃣ Github Website (with an interactive dashboard using PostgresSQL and Python, portfolio, and other webpages on reproducible research) 2️⃣ Regression Analysis of Airbnb prices in Mexico 3️⃣ Regression Analysis of H-1B sponsor rates by industry type and location In a year-long data analytics intern position, I: 1️⃣ Created and implemented a database into our center's initiative on analyzing academic technology usage. 2️⃣ Reached out to technology vendors of the university, requesting data extracts and communicating with them on the interpretation of data. 3️⃣ Streamlined data collection, and organized all data into a database that is still used at the center. 4️⃣ I cleaned and prepared several spreadsheets with hundreds of thousands of rows within Google Sheets, and provided key metrics through dashboards and reports in Google Looker Studio. 5️⃣ I connected this data and made it accessible through Slack. I reported on my progress through Slack, Asana, and Zoom meetings (disseminating findings through bi-weekly meetings). 6️⃣ I implemented data governance policies and facilitated meetings on data governance. 7️⃣ I wrote, recorded, and hosted trainings for my colleagues in Looker Studio. 8️⃣ Providing data-driven insights through story-telling. 🛠 Technical Toolkit: Languages: R, Python , SQL (PostgreSQL), Stata. Visualization: Plotly, ggplot, Looker Studio

⭐ Top-Rated Freelancer on Upwork 💯 100% Job Success Score 📊 50+ Successfully Completed Projects 🎓 IBM Certified – Data Visualization with R 🎓 IBM Certified – R for Data Science 📈 Google Analytics Certified ⚡ Fast Response Time 📑 Publication-Ready Reports 🔄 Fully Reproducible Analysis 🤝 Long-Term Client Relationships Are you looking for a Data Analyst who delivers accurate, publication-ready, and business-focused statistical analysis? With 5+ years of experience, I help researchers, businesses, healthcare professionals, and policy organizations turn complex data into reliable insights through econometrics, biostatistics, predictive modeling, forecasting, financial modeling, and statistical analysis. I've supported PhD researchers preparing for dissertation defenses, economists conducting policy evaluations, healthcare professionals publishing clinical research, and businesses making data-driven decisions. My focus is simple: select the right methodology, validate assumptions, and deliver results that are easy to understand, reproduce, and defend. I provide end-to-end data analysis using rigorous statistical methods tailored to your project. 🎓 Academic Research & Dissertation ⮞ Research Design & Methodology ⮞ Chapter 3 Statistical Support ⮞ Data Cleaning & Preparation ⮞ Hypothesis & Assumption Testing ⮞ Regression Analysis ⮞ Results Interpretation ⮞ APA Reporting 📈 Econometrics & Forecasting ⮞ OLS & Multiple Regression ⮞ Logistic & Poisson Regression ⮞ Panel Data Analysis ⮞ Fixed & Random Effects ⮞ Difference-in-Differences (DiD) ⮞ Instrumental Variables (IV) ⮞ Time Series Analysis ⮞ ARIMA Forecasting ⮞ VAR & Cointegration ⮞ Policy Evaluation 🧬 Biostatistics & Healthcare ⮞ Survival Analysis ⮞ Kaplan–Meier Curves ⮞ Cox Regression ⮞ Longitudinal Analysis ⮞ Mixed & Multilevel Models ⮞ Clinical Trial Statistics ⮞ Epidemiological Analysis 💼 Business & Financial Analytics ⮞ Financial Modeling ⮞ Revenue & Cash Flow Forecasting ⮞ Predictive Analytics ⮞ Business Intelligence ⮞ KPI Reporting ⮞Risk Analysis 💻 Software 📊 R | 📈 Stata | 🐍 Python | 📉 SPSS | 📚 SAS | 📊 EViews | 📄 Excel | 📋 Power BI 📂 Recent Projects Some projects I've completed include: 📊 SPSS Polynomial Regression with Outlier & Cook's Distance Analysis 📈 Statistical Analysis & Regression Consulting 💰 Cash Flow & Income Statement Forecasting Model 🌐 Network Collaboration Analysis Between Influencers 📑 Statistical Insights & Research Report Development 📚 Hierarchical Linear Modeling (HLM) Analysis – CK & TGFU 🌟 Client Reviews ⭐⭐⭐⭐⭐ "Finished my work in a day!! Very efficient and thorough in understanding what I needed!! Thank you, Siraj!" ⭐⭐⭐⭐⭐ "Siraj was easy to communicate with and tries his best to accommodate the client's needs." ⭐⭐⭐⭐⭐ "Siraj answered all my questions completely and quickly. He was very helpful in creating Poisson models." ⭐ What Makes Me Different? I don't simply run statistical software—I solve research and business problems. Every project includes careful data preparation, assumption testing, appropriate model selection, clear interpretation, reproducible code, and well-documented results. If a simpler model provides a stronger answer, I'll recommend it. My priority is delivering analysis that is statistically sound, transparent, and easy to defend. 📩 Have a dataset, research question, or deadline? Send me a message. I'll review your project, recommend the most appropriate analytical approach, and let you know how I can help. Data Analysis | Statistical Analysis | Data Analytics | Data Science | Econometrics | Biostatistics | Regression Analysis | Predictive Modeling | Statistical Modeling | Forecasting | Time Series Analysis | Panel Data Analysis | Financial Modeling | Financial Analysis | Business Analytics | Quantitative Research | Research Methods | Dissertation Data Analysis | Thesis Statistics | Academic Research | Clinical Data Analysis | Healthcare Analytics | Survival Analysis | Econometric Modeling | Policy Analysis | Data Visualization | R | Python | SPSS | Stata | SAS | EViews | Microsoft Excel | Power BI

MS Scholar in Mathematics & Statistics | 6+ Years Teaching & Problem-Solving Experience Need accurate solutions for math problems, SPSS/Excel analysis, or MATLAB simulations? I help students & researchers solve them step-by-step — fast, clear, and 100% reliable. 🔧 Services I Offer: 📘 Mathematics: Calculus, Linear Algebra, Probability, Discrete Math 📊 Statistics: Hypothesis Testing, ANOVA, Regression ⚙️ MATLAB/Simulink: Simulations, Modeling 🧠 Data Analysis: Python, R, Excel, Stata 📝 Exam & Assignment Help: Homework, Quizzes, Projects 🌟 Why Work With Me? 🎓 MS in Math & Stats – Precise and academic-level problem solving 👩‍🏫 6+ Years Experience – Helped 500+ students worldwide 🧩 Concept Clarity – You learn, not just get answers ⏱️ Reliable & Quick – Timely delivery with detailed explanations 📄 Plagiarism-Free – 100% original solutions, with citations if needed 💬 Let’s Get Started! Working on an urgent project or upcoming exam? Send me your task details — I respond within minutes and can start right away!

Hi, I’m Dr. Soleyman Paydar — a Statistician & Data Analyst with 17+ years of experience. I specialize in performing high-quality statistical analyses for academic, medical, and business research, and I have extensive experience preparing complete data analysis chapters for Master’s and PhD dissertations. My services include: • Comprehensive data analysis using SPSS, AMOS, and SmartPLS • Clear interpretation of quantitative results • Full APA-formatted reporting, including tables, figures, citations, and narrative explanations ready to insert into your thesis or manuscript • Guidance on methodology, research design, and statistical justification • Free initial consultation to discuss your research needs and determine the best statistical approach With a strong background in advanced statistical modeling, SEM, PLS-SEM, multivariate analysis, and non-parametric methods, I ensure your results are accurate, defensible, and aligned with academic standards. I’m committed to delivering professional, timely, and high-quality work. Feel free to reach out—I look forward to supporting your research success. Very Respectfully, Dr. Soleyman Paydar