S3.2.1 - Methods for collecting data

Methods for collecting data.; Simple random sampling.; Use of random numbers for sampling.

Use methods for collecting data to connect the rule to the data and decision in the question.

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

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

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