S2.1.2 - Mean and variance of binomial and Poisson distributions

The mean and variance of the No derivations will be required. binomial and Poisson distributions.

Use mean and variance of binomial and poisson distributions to connect the rule to the data and decision in the question.

This matters because mean and variance of binomial and poisson distributions determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply mean and variance of binomial and poisson distributions to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Mean and variance of binomial and Poisson distributions is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.