stats

Weighted Average

Dynamic value/weight pair builder — weighted mean, effective sample size, weight distribution bar chart, GPA/portfolio/survey presets.

Presets
Values & Weights
Results
Pairs n—
Weighted Mean—
Unweighted Mean—
Difference W − U—
Effective sample size—
W̄ = Σ(wᵢxᵢ)/Σwᵢ  ·  ESS = (Σwᵢ)²/Σwᵢ²