Chi-Square Goodness of Fit Calculator — Formula
## Chi-Square Goodness of Fit
**chi2 = Sum((O-E)^2/E)**
Tests observed vs expected frequency distribution.
**chi2 = Sum((O-E)^2/E)**
Tests observed vs expected frequency distribution.
Esempio Risolto
O=45, E=50, k=5.
- chi2 = 25/50 = 0.5
- df = 4