Module 8 Summary: Hypothesis Testing and p-values

What You Practised

You practised how to interpret p-values as evidence checks, not proof.

Keep These Ideas

• A null hypothesis is the default no-difference or no-effect position.
• A p-value asks how surprising the result would be if the null idea were true.
• Statistical significance is not the same as practical importance.

Writing Habit

The test result is statistically notable, but the observed 2-point increase may be too small to justify a change without cost and context.

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.