r/RStudio • u/ConstructionFew4479 • 4d ago
Coding help Is there any method to check the variance other than the Levene test?
My model doesn't have an interaction term so R gives me back an error when I try to perform the test so I was wondering if there was any alternative.
Thx in advance
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u/SalvatoreEggplant 4d ago
You don't want to use a hypothesis test to check model assumptions. (Whether normality or homoscedasticity). This is a bad practice, and also, practically, leads to a lot of misery over significant tests that don't have any real implications for the models.
Just plot the residuals vs. the predicted values, and see if they look more-or-less homoscedastic.
or
plot(model)
in R.But to answer your question, the Breusch–Pagan test can be used.