Scatter plot
Slope (b₁)–
Correlation (r)–
R²–
Data point
Best-fit line
Your line
Influential point
Regression results
–
- Points (n)
- –
- Slope (b₁)
- –
- Std error of slope
- –
- Intercept (b₀)
- –
- Correlation (r)
- –
- R²
- –
- Std error of estimate (s)
- –
- t for the slope
- –
- p-value (slope)
- –
- 95% CI for slope
- –
- Influential points
- –
Predict
- Predicted y (ŷ)
- –
- 95% CI for the mean
- –
- 95% prediction interval
- –
Residual plot
Each dot is the gap between a point and the best-fit line. A good straight-line fit leaves a shapeless cloud around zero.
Try your own line
The best-fit line is the one with the smallest total squared error. Can you match it by hand?
- Your line
- –
- Your total squared error
- –
- Best possible (best-fit line)
- –