R² (R-squared)
Also written: R-squared, R2, R², rsquared
The share of the outcome's variation the model accounts for, 1 − SSE/SST, from 0 to 1. A high R² doesn't mean the model is correct or causal.
Where the book teaches it
Related terms
Adjusted R²SSE (sum of squared errors)SST (total sum of squares)