Hi! I am using the proc glm welch option in order to implement a welch anova analysis. Is this test one-tailed or two-tailed?
This is the type of code i am using:
proc glm; class trt; model y = trt; means trt / hovtest=levene welch; run;
Thank you!
I think this is a two-sided test, as are all tests in ANOVA.
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