The data in the Drug Toxicity.jmp sample data table shows the toxicity levels for three different formulations of a drug.
1.
Select Help > Sample Data Library and open Drug Toxicity.jmp.
2.
Select Analyze > Fit Y by X.
3.
Select Toxicity and click Y, Response.
4.
Select Formulation and click X, Factor.
5.
7.
Figure 6.31 Example of Robust Fit

Help created on 10/11/2018