You've mastered statistical analysis and advanced visualization from all our previous sessions. But what happens when your insights require combining data from multiple sources?

Modern business decisions rarely depend on single datasets. You need customer data, sales data, marketing data, and external sources working together.

Engagement Message

What is one business question that would require combining multiple data sources?

Remember your cohort analysis from last time? What if you could enrich those cohorts with customer survey data, support ticket volumes, and social media engagement?

Advanced data sourcing transforms your statistical insights from good to game-changing by providing complete customer pictures.

Engagement Message

How might adding survey data change your cohort retention interpretations?

APIs (Application Programming Interfaces) are your gateway to real-time external data. Instead of manually downloading files, APIs automatically feed fresh data into your analysis.

Think weather data for retail forecasting, economic indicators for financial analysis, or social media metrics for brand monitoring.

Engagement Message

What external data source could improve your industry's decision-making?

Data warehouses centralize information from multiple business systems. Your CRM, accounting software, marketing tools, and website analytics all feed into one unified source.

This eliminates the nightmare of manually combining Excel files from different departments with conflicting customer IDs.

Engagement Message

What is one challenge of analyzing data from separate, unconnected systems?

Here's where your segmentation skills become crucial. Different data sources often define customers differently - email subscriber vs. paying customer vs. support ticket creator.

You need a "master customer ID" that links the same person across all your data sources.