simultaneous confidence interval for difference between slopes in ANCOVA


New Member
I am new to the forum and R. I am using R version 3.2.0 on Windows7.

I am trying to find the simultaneous confidence interval of pairwise difference between slopes. In my data, there are three variables - Y, X and group. I am trying to find CI of difference between slopes for all the combinations (there are total 5 groups and therefore 10 combinations of slopes).

Any guidance would be very helpful.

Thanks in advance,