B.1.3—Measurement uncertainty

Identify measurement uncertainties and use simple techniques to determine uncertainty when data are combined, including uncertainty from two burette readings used to calculate a titre.

Use b.1.3—measurement uncertainty to connect the rule to the data and decision in the question.

This matters because b.1.3—measurement uncertainty determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply b.1.3—measurement uncertainty to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: B.1.3—Measurement uncertainty is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.