Is there any way to calculate in r the O'Brien test for homogeneity of variance?
Hi there!
I think I found something that can help your specific use case. Have a look at levene.test in https://cran.r-project.org/web/packages/lawstat/lawstat.pdf you can specify an argument in correction.method to accommodate O'Brien's calcs. See if that helps?
There doesn't appear, at first glance, a package which provides the function you need.
The car package provides leveneTest(), which is the basis for the O'Brien test. If that works for you, great, otherwise you will likely need to implement it yourself.
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