R-Squared Calculator
Calculate R² (coefficient of determination) to measure how well predictions fit observed data
About R-Squared
R² (coefficient of determination) measures the proportion of variance in the dependent variable that is predictable from the independent variable(s).
Formula: R² = 1 - (SS_res / SS_tot)
Range: 0 to 1 (0% to 100%)
Interpretation:
- R² = 1: Perfect fit
- R² = 0: Model explains no variance
- Higher values indicate better model fit