Free Confidence Interval for Variance and Standard Deviation Calculator - Calculates a (95% - 99%) estimation of confidence interval for the standard deviation or variance using the χ^{2} method with (n - 1) degrees of freedom.

This calculator has 3 inputs.

This calculator has 3 inputs.

Degrees of Freedom = n - 1

Square Root((n - 1)s^{2}/χ^{2}_{α/2}) < σ < Square Root((n - 1)s^{2} / χ^{2}_{1 - α/2})

Square Root((n - 1)s^{2}/χ^{2}_{α/2}) < σ^{2} < Square Root((n - 1)s^{2} / χ^{2}_{1 - α/2})

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Square Root((n - 1)s

Square Root((n - 1)s

For more math formulas, check out our Formula Dossier

- confidence interval
- a range of values so defined that there is a specified probability that the value of a parameter lies within it.
- confidence interval for variance and standard deviation
- a range of values that is likely to contain a population standard deviation or variance with a certain level of confidence
- degrees of freedom
- number of values in the final calculation of a statistic that are free to vary
- standard deviation
- a measure of the amount of variation or dispersion of a set of values. The square root of variance
- variance
- How far a set of random numbers are spead out from the mean