Standard Deviation Calculator

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Calculate standard deviation, variance, mean, sum, and margin of error for any dataset

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Population

Sample

Standard Deviation

Variance

Mean

Sum

Count

Margin of Error

Formula Explanation

Standard Deviation (σ) = √[Σ(x - μ)² / N] for population

Standard Deviation (s) = √[Σ(x - x̄)² / (n - 1)] for sample

Where: x = each value, μ = population mean, x̄ = sample mean, N = population size, n = sample size