S1.4.3 - Product moment correlation

The product moment correlation Derivations and tests of significance will not be required. coefficient, its use, interpretation and limitations.

Use product moment correlation to connect the rule to the data and decision in the question.

This matters because product moment correlation determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply product moment correlation to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Product moment correlation is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.