Regression Analysis Online Tool
Online linear regression analysis tool. Calculates the regression equation, R² coefficient of determination, residual analysis and prediction intervals, with scatter plot visualization.
What R² indicates a good fit?
The closer R² is to 1, the better. Generally R² > 0.7 is considered a good fit and > 0.9 a strong relationship, but residual analysis is still needed to judge whether the model is appropriate.