Sampling

Sampling MethodsSign up

understand the purpose of sampling and recognise common sampling methods (simple random, stratified, systematic, quota, cluster, opportunity), including their advantages and disadvantages

The Distribution of the Sample MeanSign up

understand and use the result that if X has mean μ and variance σ^2, then the sample mean of n independent observations has mean μ and variance σ^2 / n, and is normally distributed when X is normal or n is large (central limit theorem)