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Ubify Financial Advisory Board
FINANCIAL ANALYSTS & CPA REVIEWERS
About This Tool
Calculate the statistical dispersion of any dataset instantly. Our Standard Deviation Calculator computes sample standard deviation (Bessel's correction divided by n-1), population standard deviation (divided by N), arithmetic mean, sum of squares, and variance.
Formulas Used: ā¢ Sample Std Dev: s = ā[ Ī£(xi - xĢ)Ā² / (n - 1) ] ā¢ Population Std Dev: Ļ = ā[ Ī£(xi - Ī¼)Ā² / N ] ā¢ Variance: sĀ² or ĻĀ²
How to Use
- 1
Paste or type your numbers separated by commas, spaces, or line breaks.
- 2
Review the parsed count of valid numbers.
- 3
Examine the sample standard deviation, population standard deviation, mean, and variance updated in real time.
Frequently Asked Questions
When should I use Sample vs Population Standard Deviation?
Use Sample Standard Deviation (divided by n-1) when your data is a sample or subset of a larger group. Use Population Standard Deviation (divided by N) when your data represents the entire population being measured.
What does a high standard deviation indicate?
A high standard deviation indicates that the data points are spread out over a wider range of values from the mean, whereas a low standard deviation indicates that the values tend to be close to the mean.