Use the Oneway platform to test for differences in means using the multiple comparison analysis of means (ANOM) method.
1. Select Help > Sample Data Folder and open Analgesics.jmp.
2. Select Analyze > Fit Y by X.
3. Select pain and click Y, Response.
4. Select drug and click X, Factor.
5. Click OK.
6. Click the Oneway Analysis red triangle and select Analysis of Means Methods > ANOM.
Figure 6.11 Analysis of Means Decision ChartÂ
From the ANOM decision chart, notice that the means for drug A and C are statistically different from the overall mean. The drug A mean is lower and the drug C mean is higher. Note the decision limits for the drug types are not the same, due to different sample sizes.