P3.2-Quality of data

Make and record accurate measurements, choose a range that spans the largest possible values within the equipment or instructions, and recognise when data quality is judged by scatter, supervisor data or known values.

Use quality of data to connect the rule to the data and decision in the question.

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

Example: apply quality of data to one small, clearly defined case, show the key step or comparison, and explain the result in words.

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