Standard Deviation Calculator – Standard Deviation Calculator. The following is a free online tool to calculate the standard deviation, variance, mean, sum, and confidence range for given numbers.

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Standard Deviation | R Tutorial – The standard deviation of an observation variable is the square root of its variance. Problem. Find the standard deviation of the eruption duration in the data set …

In statistics, the standard deviation (SD, also represented by the Greek letter sigma σ or the Latin letter s) is a measure that is used to quantify the amount of …

Unbiased estimation of standard deviation – Wikipedia – In statistics and in particular statistical theory, unbiased estimation of a standard deviation is the calculation from a statistical sample of an estimated value of …