Simple random sample

In statistics, a simple random sample (or SRS) is a subset of individuals (a sample) chosen from a larger set (a population) in which a subset of individuals are chosen randomly, all with the same probability. It is a process of selecting a sample in a random way. In SRS, each subset of k individuals has the same probability of being chosen for the sample as any other subset of k individuals.^[1] Simple random sampling is a basic type of sampling and can be a component of other more complex sampling methods.^[2]

^ Yates, Daniel S.; David S. Moore; Daren S. Starnes (2008). The Practice of Statistics, 3rd Ed. Freeman. ISBN 978-0-7167-7309-2.
^ Thompson, Steven K. (2012). Sampling. Wiley series in probability and statistics (3rd ed.). Hoboken, N.J: John Wiley & Sons. ISBN 978-1-118-16293-4.

[1] Yates, Daniel S.; David S. Moore; Daren S. Starnes (2008). The Practice of Statistics, 3rd Ed. Freeman. ISBN 978-0-7167-7309-2.

[2] Thompson, Steven K. (2012). Sampling. Wiley series in probability and statistics (3rd ed.). Hoboken, N.J: John Wiley & Sons. ISBN 978-1-118-16293-4.

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