S2.1.3 - The

The use of the Poisson distribution as an approximation to the binomial distribution.

Use the to connect the rule to the data and decision in the question.

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

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

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