Homogeneity of regression slopes

[saraf]

If assumption of homogeneity of regression slopes broken in ANCOVA analysis, what to do? Can I use linear regression instead? Thanks

 

[Dragan]

If assumption of homogeneity of regression slopes broken in ANCOVA analysis, what to do? Can I use linear regression instead? Thanks

A common approach used to your problem is the Johnson-Neyman technique.

http://wjn.sagepub.com/content/26/7/804.abstract

 

[saraf]

Hello Dragan, thank you for your suggestion, I will look at it.

 

[nelson85]

Hi,
how can I test the homogeneity of regression slopes? Does Minitab do it automatically in any of its tools?
Thank you in advance!
Regards