I don’t understand why you don’t include the full text of the error.
—
David
Sent from my iPhone
> On Jan 19, 2025, at 10:00 AM, Sparks, John via R-help <r-help@r-project.org>
> wrote:
>
> Hello R-Helpers,
>
> I was looking into how to test whether the beta coefficient from a regression
> would be the same for two different groups contained in the dataset for the
> regression.
>
> When I put that question into google, AI returned a very nice looking answer
> (and a couple of variations on it).
>
> library(car)
> data <- data.frame(income = c(30, 45, 50, 25, 60, 55),
> education = c(12, 16, 14, 10, 18, 16),
> gender = c("Male", "Female", "Male", "Female", "Male",
> "Female"))
> model <- lm(income ~ education * gender, data = data)
> # Test if the beta for "education" is significantly different between genders
> test <- linearHypothesis(model, "genderMale - genderFemale = 0")
> print(test)
>
> This, however, produces an error that I can't find a way to resolve.
>
> Can this test actually be done in this manner, or is this a case of AI run
> amok.
>
> Guidance would be appreciated.
> --John Sparks
>
>
>
> [[alternative HTML version deleted]]
>
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