S3.3.3 - Concept of a confidence interval

Concept of a confidence interval and its interpretation.; Link confidence intervals with hypothesis tests.

Use concept of a confidence interval to connect the rule to the data and decision in the question.

This matters because concept of a confidence interval determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply concept of a confidence interval to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Concept of a confidence interval is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.