Example of an Equivalence Test

In this example, you investigate whether the difference in height between males and females is less than 6 inches.

1. Select Help > Sample Data Library and open Big Class.jmp.

2. Select Analyze > Fit Y by X.

3. Select height and click Y, Response.

4. Select sex and click X, Factor.

5. Click OK.

6. Click the red triangle Oneway Analysis of height By sex and select Equivalence Tests.

7. Type 6 as the difference considered practically zero.

8. Click OK.

Figure 6.30 Example of an Equivalence Test 

Using two one-sided tests, you can see that the p-value is small for both. Therefore, you can conclude that the difference in population means is located somewhere between -6 and 6. For your purposes, you can declare the means to be practically equivalent.

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