9.1.3 - Experimental and research designs

9.1.3 Experimental/research designs: independent groups, repeated measures and matched pairs.

Use - experimental and research designs to connect the rule to the data and decision in the question.

This matters because - experimental and research designs determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - experimental and research designs to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Experimental and research designs is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.