2.2.5 - Experimental and research designs

2.2.5 Experimental and research designs: repeated measures, independent groups and matched pairs, the issues with each and possible controls.

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.