Data Science · Lesson 100 of 101
Your Cheat Sheet
The whole course on one page.
Here's the entire course, in a few screens. Pause and take a screenshot.
- The whole course
- Pause and screenshot
- Keep it close
Which tool?
Quick table work, use pandas. Big data, use SQL. Compare means, use a t test. Compare rates, use a proportions test. Is it real? Use a bootstrap. What caused it? Use an experiment, or regression with controls. What's next? Use baselines, then a forecast.
| Task | Tool |
|---|---|
| Table work | pandas |
| Big data | SQL |
| Compare groups | t-test, proportions |
| Any uncertainty | Bootstrap |
| What caused it? | Experiment, controls |
| What happens next? | Baselines, then forecast |
The recipe
Here's the recipe. Frame the decision. Audit and clean. Explore shapes and relationships. Quantify uncertainty. Ask about cause. Compare options. Lead with the answer. Then measure what happens.
Frame the decisionfirst, always
Audit and cleantrust your data
Exploreshapes and links
Quantify and testsignal or luck?
Lead with the answerthen measure
Summary
That's everything on one page. Now let's talk about what comes next.
Key takeaways- Frame, clean, explore
- Test, then decide
- Lead with the answer
Next up: Your Roadmap — what to do next