Sampling: Random Sample Selection Explained Edit Title

This article explains how to choose random samples among a population.

In statistical terms a random sample is a set of items that have been drawn from a population in such a way that each time an item was selected, every item in the population had an equal opportunity to appear in the sample. In practical terms, it is not so easy to draw a random sample.

http://www.animatedsoftware.com/statglos/sgrandsa.htm

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