Residual Calculator — सूत्र

## Regression Residuals

A residual is the difference between an observed value and its predicted value from the regression model. Residuals are the foundation for assessing model fit and detecting problems.

### Formula

**e_i = y_i - y-hat_i**

Positive residuals mean the model under-predicted; negative residuals mean over-prediction. In a well-fitting model, residuals should be randomly scattered around zero with no patterns.