3.3.9 - Uncertainty and systematic error sources

Identify possible sources of uncertainty or systematic error and explain how they may be reduced or eliminated.

Use - uncertainty and systematic error sources to connect the rule to the data and decision in the question.

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

Example: apply - uncertainty and systematic error sources to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Uncertainty and systematic error sources is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.