9.1.1 - Types of data

9.1.1 Types of data: qualitative and quantitative data; primary and secondary data.

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

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

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

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