If notation or a term is listed, then provide the complete...

If notation or a term is listed, then provide the complete definition (including reference to the sample vs. the population where appropriate). If a definition is listed, then provide the associated notation or term. As a hypothetical example, if the exam were to list π, then you would answer "The ratio of a circumference of a circle to its diameter". If the exam listed "The ratio of a circumference of a circle to its diameter", then you would answer with π.

Mean of Population

σ

Mean of Sample

s

Set of sample averages (from same population)