Standard Deviation Calculator
Calculate dispersion and variance for your data set instantly.
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In-Depth Guide
Everything you need to know
Dispersion Analysis
Standard Deviation measures the amount of variation or dispersion in a set of values. Understand how spread out your data is relative to the mean.
Sample Variance
Our tool uses Bessel's correction (n-1) to provide an unbiased estimate of the population variance from your sample data.
Common Applications
Investment Volatility Analysis
Scientific Research Reliability
Manufacturing Quality Control
Test Score Distribution
Biological Variation Studies
A/B Test Confidence Intervals