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Standard Deviation Calculator

Calculate mean, median, modes, range and sample/population standard deviation for a list.

How It Works

Mean=sum/n. Range=max−min. Population variance divides squared deviations by n; sample variance divides by n−1.

Reference Sources

FAQs

How does this calculator work?

Mean=sum/n. Range=max−min. Population variance divides squared deviations by n; sample variance divides by n−1.

What assumptions should I check?

Check the units and definitions shown beside each input. Results use the values you enter.