MedCalcComparison of standard deviations
This calculator uses an F-test to compare the standard deviations of two independent samples and assess whether they differ significantly.
Required input
For both samples, you enter:
- Standard deviation: the observed standard deviation.
- Sample size: the sample size or total number of observations in the sample.
Interpretation
In this test, the square of the standard deviations is calculated to obtain the corresponding variances, and an F-test is performed.
If the P-value is less than 0.05, the conclusion is that the two standard deviations indeed differ significantly.
How to cite this page
- MedCalc Software Ltd. Comparison of standard deviations. https://www.medcalc.org/en/calc/comparison_of_standarddeviations.php (Version 23.5.1; accessed April 18, 2026)
Other free statistical calculators
- Comparison of means
- Comparison of Coefficients of Variation
- Other statistical tests calculators
- Sample size calculation
- Post-hoc power analysis
See also
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