Example of the Cochran Armitage Trend Test

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Basic Analysis • Contingency Analysis • Additional Examples of the Contingency Platform • Example of the Cochran Armitage Trend Test

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Example of the Cochran Armitage Trend Test

1.

Select Help > Sample Data Library and open Car Poll.jmp.

For the purposes of this test, change size to an ordinal variable:

2.

In the Columns panel, right-click on the icon next to size and select Ordinal.

3.

Select Analyze > Fit Y by X.

4.

Select sex and click Y, Response.

5.

Select size and click X, Factor.

6.

7.

From the red triangle menu next to Contingency Analysis, select Cochran Armitage Trend Test.

Figure 6.68 Example of the Cochran Armitage Trend Test Report

The two-sided p-value (0.7094) is large. From this, you cannot conclude that there is a relationship in the proportion of male and females that purchase different sizes of cars.

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Help created on 10/11/2018