thesaurus.maths.org

A small group of things that are taken from a larger group of things and studied so that more can be said about the nature of the larger group.
E.g. If four pupils are taken from each class in your school and their heights are measured, the average height of all the pupils in your school can be estimated.
A sample is usually chosen at random.

A type of statistical experiment in which we choose a few members of a population at random and look at their properties.