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GabrielZ
GabrielZ
Level I

About ANOM for variances

Created: Dec 27, 2022 06:03 AM  |  Last Modified: Jun 8, 2023 5:58 PM (1800 views)

Hi,

 

I'm now studying the ANOM for variances. I don't understand why it needs at least three groups to start the comparison. Does anyone know the reason behind this? 

 

Thank you!

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Byron_JMP
Staff Byron_JMP
Staff

Re: About ANOM for variances

Dec 28, 2022 02:28 PM (1765 views)  |  Posted in reply to message from GabrielZ 12-27-2022

I think this link will answer your questions

 

Karen Copeland, Ph.D. Boulder Statistics, Boulder, CO 80304https://community.jmp.com › kvoqx44227 › ...

 

Dr. Copeland says, "

In the case of just two treatments the student’s t-test is often the appropriate method to test for a treatment effect. However, using multiple applications of the t-test to test multiple comparisons within a single study is not appropriate. Rather, one should choose a multiple comparison method suited for the particular question your data is to address."

 

 

JMP Systems Engineer, Health and Life Sciences (Pharma)
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