cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Show  only  | Search instead for 
Did you mean: 
New to using JMP? Hit the ground running with the Early User Edition of Discovery Summit. Register now, free of charge.
Register for our Discovery Summit 2024 conference, Oct. 21-24, where you’ll learn, connect, and be inspired.
Choose Language Hide Translation Bar
dweinber
dweinber
Level I

Cochran Armitage exact?

This widget could not be displayed.
Created: Jan 3, 2022 06:30 PM  |  Last Modified: Jan 4, 2022 8:45 AM (618 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? 

0 Kudos
1 REPLY 1
Mark_Bailey
Staff Mark_Bailey
Staff

Re: Cochran Armitage exact?

This widget could not be displayed.
Created: Jan 4, 2022 09:54 AM  |  Last Modified: Jan 4, 2022 6:54 AM (580 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.