What this lesson covers
How do I know a change worked, and wasn't just luck?
- Hypotheses and test design
- A/B and multivariate tests
- Sample size and significance in plain language
- Conversion rate optimization
- Learning from failed tests
Why this matters now
Placeholder for the lesson's opening story: a vivid, real moment where a marketer or small-business owner meets this exact problem.
Client Track
Placeholder for the optional Client Track sidebar: how to apply this lesson to a real business, client, campus organization or cause.
Key terms
Placeholder for the lesson's key vocabulary.