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dweinber
dweinber
Level I

Cochran Armitage exact?

Created: Jan 3, 2022 06:30 PM  |  Last Modified: Jan 4, 2022 8:45 AM (785 views)

I have data for a 5 year period. there is binary feature (registered/unregistered) represented by a column in the data.

 

I want to see if there is a trend for proportion unregistered items year by year across the 5 year period.

The Cochran Armitage trend test seems like the appropriate statistic (yes?). 

 

The the number of unregistered items is single digits for multiple years, and is even zero one year.  It would seem I need the Cochrane Armitage Exact test, but don't think it is available (JMP14.3.0 for Mac)

 

Am I missing something? 

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1 REPLY 1
Mark_Bailey
Staff Mark_Bailey
Staff

Re: Cochran Armitage exact?

Jan 4, 2022 09:54 AM (747 views)  |  Posted in reply to message from dweinber 01-03-2022

You must be sure that the data columns that you use in the Y and X analysis roles use the Ordinal modeling type before you initiate this analysis. Then select Analyze > Fit Y by X, select the binary response and click Y. Select the year data column and click X. Click the red triangle at the top and select the trend test.