THE DATA DICTIONARY / A FIELD GUIDE

Good questions
begin with data

A birthday. A scholarship. A banking crisis.
Behind every dataset is a story—and a question worth exploring.

Meet the people and policies behind the numbers. Follow an interactive, guided investigation from your first chart to your next causal question.

Find your first investigation No Python experience needed.
15 data stories1 simulation lab30–45 minutes each
A GLIMPSE INSIDEChapter 05

Two districts.
One banking crisis.

Would a different response change the course of a crisis?

Banks still operating · annual July 1 snapshotsFollow this story
01

Meet the caseUnderstand the setting. Make a prediction.

02

Explore the evidenceHover, compare, and make a chart your own.

03

Ask what explains itA pattern starts the causal conversation.

CHOOSE A QUESTION THAT STAYS WITH YOU

The case collection

Start anywhere. Every notebook
guides you from the first cell.

Loading the case collection…

A PATTERN IS AN INVITATION

What would you need to know
before calling it a cause?

Take that question into the chapter. The strongest discovery is often a better comparison.

Return to the course