Standard Deviation
Calculates standard deviation as the square root of data variance.
Population standard deviation
2,00
Population σ: divisor n (not sample n−1).
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Formula
population σ = √(Σ(x − μ)² / n) — divisor n (not sample n−1)
Example: For 2, 4, 4, 4, 5, 5, 7, 9, population σ ≈ 2.0
Methodology
Population σ = √(Σ(x−μ)² / n) - divisor n, not sample n−1.
Example
2, 4, 6: mean 4 → σ = √((4+0+4)/3) ≈ 1.63.