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Standard Deviation Calculator

Inputs

Data Values

Enter comma or space-separated numbers

Calculation Type

Sample: divide by n-1. Population: divide by n

Mean (Average)

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Variance

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Standard Deviation

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Measures how spread out your data is from the mean

Sample Size

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Formula

σ = √[Σ(x - μ)² / N] or s = √[Σ(x - x̄)² / (n - 1)]