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Basic Analysis and Graphing - SAS

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Chapter 5 Performing Oneway <strong>Analysis</strong> 169<br />

Additional Examples of the Oneway Platform<br />

Figure 5.22 Example of With Control, Dunnett’s Comparison Circles<br />

Using the comparison circles in Figure 5.22, you can conclude that level 17 is the only level that is<br />

significantly different from the control level of 12.<br />

Example Contrasting All of the Compare Means Tests<br />

1. Open the Big Class.jmp sample data table.<br />

2. Select Analyze > Fit Y by X.<br />

3. Select weight <strong>and</strong> click Y, Response.<br />

4. Select age <strong>and</strong> click X, Factor.<br />

5. Click OK.<br />

6. From the red triangle menu, select each one of the Compare Means options.<br />

Although the four methods all test differences between group means, different results can occur. Figure 5.23<br />

shows the comparison circles for all four tests, with the age 17 group as the control group.

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