Population vs Sample Std Dev

Population vs Sample Std Dev. σ vs s — which formula to use. Fast, accurate, private.

Numbers

Standard deviation

5.237229

Mean18.000000

Variance27.428571

Count8

Steps

Compare population standard deviation (σ) vs sample standard deviation (s) with n vs n−1 divisor.

Are results official?

No — quick estimates only. Confirm with your bank or provider.

Is data saved?

No. Calculations run in your browser.

Where is the full tool?

Each satellite links back to the main hub calculator.