Standard Deviation Calculator
Math CalculatorsCalculate population and sample standard deviation.
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Sample SD
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Population SD
About This Tool
Compute standard deviation, variance, and mean for any dataset. Supports both sample and population calculations for statistical accuracy.
Frequently Asked Questions
Standard deviation is a measure of the amount of variation or dispersion of a set of values.
Sample SD is used for a subset of a population (divides by n-1), while Population SD is for the entire dataset (divides by n).
A high standard deviation indicates that the data points are spread out over a wider range of values from the mean.
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