Well: 1) 8th grade algebra tells me B2/B1 == 0 <==> B2 =0;
2) I suspect you would need to provide more context for the other, as you may be going about this entirely incorrectly (have you consulted a local statistician?): your nonlinear hypothesis probably can be made linear under the right parametrization, but context might suggest something entirely different than the approach that motivated your query. 3) But forget all that! -- this is a list about the R language, not statistics -- which seems to be the essence of your query -- although I grant that the intersection is nonempty. But for statistics help, you should try a statistics list like stats.stackexchange.com instead. Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." Clifford Stoll On Fri, Sep 5, 2014 at 7:17 PM, Chris <bonsxa...@yahoo.com> wrote: > Hi. > > Say I have a model like > > y = a + B1*x1 + B2*x2 + B3*x3 + B4*x4 + e > > and I want to test > > H0: B2/B1 = 0 > > or > > H0: B2/B1=B4/B3 > > (whatever H1). How can I proceed? > > I now about car::linearHypothesis, but I can't figure out a way to do the > tests above. > > Any hint? > > Thanks. > > C > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
