3.P5—Uncertainties and errors

Recognise and evaluate measurement uncertainties and errors.

Use .p5—uncertainties and errors to connect the rule to the data and decision in the question.

This matters because .p5—uncertainties and errors determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply .p5—uncertainties and errors to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: .P5—Uncertainties and errors is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.