Module 12 Summary: Experiments, A/B Tests, and Statistical Reporting

What You Practised

You practised how to bring the course together in a careful evidence report.

Keep These Ideas

• A/B tests compare variants, usually with a treatment and control.
• Random assignment helps make a causal claim more credible.
• A good report states question, data, method, result, uncertainty, limits, and next step.

Writing Habit

Variant B has a modestly higher signup rate than A in this synthetic summary; Variant C needs more evidence because its sample is much smaller.

Before Moving On

You are ready for the next module when you can explain the module idea without reading the answer key and can name the main unsafe claim to avoid.