About this example
This small example separates two supplied groups by marker shape and colour. The repeated concentration of 1 mg/L remains two different measurements rather than being averaged.
Group markers identify observations; they do not establish a treatment effect. The example provides no uncertainty estimates or fitted dose-response relationship.
The data
| X | Y | Group |
|---|---|---|
| 0 | 2 | Control |
| 1 | 3 | Control |
| 1 | 4 | Treatment |
| 3 | 6 | Treatment |
Each row is a supplied numeric pair; reference lines are not fitted models. Open the example, replace the data with your own, and export the figure as SVG, PDF, PNG or TIFF.