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Standard Deviation Calculator — Free Online Tool
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Standard Deviation Calculator

Calculate mean, variance, and standard deviation for a data set

Formula: Population Standard Deviation $\sigma = \sqrt{\frac{\sum (x - \mu)^2}{n}}$ and Sample Standard Deviation $s = \sqrt{\frac{\sum (x - \bar{x})^2}{n - 1}}$. Enter comma-separated values below.
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⚠️ For educational purposes only. Verify results with a qualified professional when making important decisions.

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