Online Statistics Formulas
Display common statistics formulas: mean, variance, standard deviation, and more.
- Sample mean
x̄ = (1/n) Σxᵢ - Population mean
μ = (1/N) Σxᵢ - Sample variance
s² = (1/(n−1)) Σ(xᵢ − x̄)² - Population variance
σ² = (1/N) Σ(xᵢ − μ)² - Sample standard deviation
s = √s² - Population standard deviation
σ = √σ² - Sum of squares
SS = Σ(xᵢ − x̄)²
Frequently Asked Questions
- What formulas are shown?
- Sample mean, population/sample variance, standard deviation, and common notation (n, x̄, σ, s).
- Population vs sample?
- Population variance uses N and μ; sample variance uses n−1 (Bessel's correction) and x̄.
- Can I copy the formulas?
- Yes. Use the copy button to copy the formula list as text.
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