Data Analytics Portfolio

Hi, I’m Rosanne Sim

Aspiring Data Analyst specialising in SQL and dashboard-driven insights. I build end-to-end analyses — from data extraction to business recommendations — focused on real-world decision making.

📊 Customer Churn Analysis
NEW
Tableau / SQL

Identified key drivers of customer churn in a telecommunications dataset and developed targeted retention strategies. Built interactive dashboards revealing contract type and early tenure as the highest-risk segments.

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📊 IBM SQL Chicago Analysis
SQL

Exploring socioeconomic, education & crime datasets in Chicago using structured queries and stakeholder-style insights.

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📊 Power BI Dashboard Portfolio
Power BI

Dashboards designed for business users — clean layouts, DAX measures, drilldowns.

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📊 Titanic Survival Prediction
Python / ML

Kaggle-style machine learning project predicting passenger survival using Python, Pandas, and Random Forest. Includes data cleaning, EDA, and model evaluation.

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More projects coming
In Progress

R visualisations, Power BI dashboards, and mini business case studies will be added here soon.

Contact me →