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.
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
📊 IBM SQL Chicago Analysis
SQL
Exploring socioeconomic, education & crime datasets in Chicago using structured queries and stakeholder-style insights.
View project →📊 Power BI Dashboard Portfolio
Power BI
Dashboards designed for business users — clean layouts, DAX measures, drilldowns.
View project →📊 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.
View project →More projects coming
In Progress
R visualisations, Power BI dashboards, and mini business case studies will be added here soon.
Contact me →