# sample standard deviation

- an estimate of the population standard deviation, usually determined (from a sample of size
*n*) by dividing the sum of the squared deviations from the sample mean by*n*−1 and taking the square root;*n*−1 is used (rather than*n*) in order to obtain an unbiased estimate of the population variance. Symbol*s.*

*Medical dictionary.
2011.*

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