What is a Q-Q Plot?
Regression assumes residuals follow a normal distribution. A Q-Q plot compares actual residuals to a perfect normal curve.
Interpretation:
Interpretation:
- Points near the diagonal → residuals are normal → model assumptions valid
- Curved or S-shaped pattern → non-normal residuals → consider transforms or hybrid model
Try it in the app
Try: Run regression → scroll to Q-Q Plot in Results → Advanced Charts.