6.3.3 - Measuring variables

Describe how to measure relevant variables using the most appropriate instruments and techniques.

Use - measuring variables to connect the rule to the data and decision in the question.

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

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

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