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Rem598/README.md

Hi there, I'm Rehema πŸ‘‹

Data Analyst | Statistician | Researcher

I specialize in extracting actionable insights from complex datasets through statistical analysis and business intelligence. My work spans rigorous hypothesis testing, root cause analysis for operational problems, and building interactive dashboards that communicate data clearly.

Portfolio LinkedIn


πŸ’‘ What I Do

Statistical Analysis
Hypothesis testing (Welch's t-tests, Mann-Whitney U, Bayesian inference), experimental design, and rigorous research methodology to validate assumptions and quantify impact.

Root Cause Analysis
Systematic investigation of operational problems using data segmentation, statistical validation, and evidence-based recommendations.

Business Intelligence
Interactive dashboards (Power BI, Tableau, Looker Studio) that track revenue, identify profit opportunities, and support strategic decision-making.

Data-Driven Strategy
Translating complex technical findings into clear, actionable business recommendations that non-technical stakeholders can act on.


πŸ› οΈ Tech Stack

Statistical Methods: Hypothesis Testing β€’ Experimental Design β€’ Bayesian Inference β€’ Regression Analysis
Languages: R β€’ Python β€’ SQL
Visualization: Power BI β€’ Tableau β€’ Looker Studio
Tools: SPSS β€’ Excel β€’ Google Apps Script


⭐ Featured Projects

Conducted Welch's two-sample t-test on 17,400+ hourly observations to quantify weather impact on public transit demand. Delivered data-backed staffing recommendations achieving Β£23K/month cost savings through evidence-based dynamic scheduling.

Tech: Python β€’ Hypothesis Testing β€’ Statistical Validation
Impact: 38.7% demand impact quantified, operational optimization enabled


Analyzed 185,000+ e-commerce transactions testing whether $X.99 pricing increases sales. Applied Mann-Whitney U test after confirming non-normal distribution. Found significant effect for phones (+5.16% lift, p<0.001) but no effect for laptops.

Tech: Python β€’ Mann-Whitney U Test β€’ Non-Parametric Statistics
Impact: Clear evidence for category-specific pricing strategies


Built Power BI dashboard tracking $66.31M revenue across 4 regions. Automated invoice alerts with Google Apps Script and conducted root cause analysis identifying specific warehouses causing fulfillment delays.

Tech: SQL β€’ Power BI β€’ Google Apps Script β€’ Root Cause Analysis
Impact: 60% reduction in manual work, improved data validation


Designed Beta-Binomial Bayesian model testing product density impact on conversion rates. Conducted sensitivity analysis comparing Bayesian vs Frequentist approaches. Demonstrated 98% probability of superiority.

Tech: Python β€’ Bayesian Statistics β€’ A/B Testing β€’ Monte Carlo
Impact: Rigorous experimental design framework, probabilistic recommendations


Analyzed 5,000+ transactions using statistical validation to diagnose 48% return rate. Isolated defective product variant through systematic data segmentation. Delivered recommendations projected to increase profit margin by 23%.

Tech: SQL β€’ Power BI β€’ Root Cause Analysis
Impact: Clear identification of quality issue, strategic action plan


πŸ“‚ More Projects

Statistical Research:
Nobel Prize Trends (124 years) β€’ Coffee Shop Survey Analysis (R) β€’ Cluster Analysis (Health Data)

Business Intelligence:
E-Commerce Superstore Dashboard β€’ Customer Segmentation (Tableau) β€’ Social Media Ad Performance

Data Analysis:
Demographic Analysis β€’ College Event Feedback (NLP)

β†’ View Full Portfolio


Certifications:
J.P. Morgan Quantitative Research β€’ BCG Data for Decision Makers β€’ Deloitte Data Analytics β€’ Accenture Data Analytics & Visualization

View all certifications β†’


πŸ’¬ Let's Connect

I'm open to discussing data projects, research opportunities, or roles in analytics and business intelligence.


"The best insights come from asking the right questions, testing assumptions with data, and translating findings into decisions that create measurable impact."

Pinned Loading

  1. Forecasting-Demand-by-Weather Forecasting-Demand-by-Weather Public

    Quantifying the impact of weather on service demand to optimize staffing schedules. Analyzed 17,000+ hours of data using Python to recommend dynamic scheduling.

    Jupyter Notebook

  2. Retail-Ops-Finance-Optimization Retail-Ops-Finance-Optimization Public

    End-to-end MIS project optimizing supply chain and finance workflows using SQL, Google Apps Script, and Power BI.

    JavaScript

  3. Polo-Shirt-Product-Performance-Analysis Polo-Shirt-Product-Performance-Analysis Public

    End-to-end product analysis of 5,000+ e-commerce transactions using SQL. Identified root causes for a 48% return rate and developed strategic recommendations to improve profitability and inventory …