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 Mann-Whitney Question / Statistic General
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19102208

Germany
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Posted - 12/10/2008 :  05:45:47 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic

I have a question conerning the Mann-Whitney Test in Origin 8.

Consider I have two columns A and B.
I want to test A versus B.

I always get the error message
"Grouping range should have two levels".

How exactly do I place the columns?
What do I put in group range and what in data range?

Thanks for help.

VincentLiu

China
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Posted - 12/11/2008 :  02:06:26 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Matthias,

There are two ways to solve the problem.

Method 1
If you want to use the Mann-Whitney Test tool (Statistics: Nonparametric Tests: Mann-Whitney Test), you need to reorganize your data as the following image shows. And select col(B) as Group Range, col(A) as Data Range after you opened the tool.




Method 2
If you don't want to change your datasets' organization, you can change to use the (NPH) Two Independent Samples tool (Statistics: Nonparametric Tests: (NPH) Two Independent Samples). And set the dialog as the image shows




Edited by - VincentLiu on 12/11/2008 02:13:35 AM
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couturier

France
291 Posts

Posted - 12/11/2008 :  2:25:26 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
How about providing raw data/indexed data options (like in ANOVA) so it is not always needed to reorganize data ?
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