Note that the standard errors in those cases is 0, so the calculation will involve division by 0.
Without your data, it's impossible to say what is causing this, but it could be perfect collinearity, I think.
April 27 – 30 | Gaylord Texan | Grapevine, Texas
Registration is open
Walk in ready to learn. Walk out ready to deliver. This is the data and AI conference you can't afford to miss. Register now and lock in 2025 pricing—just $495!
ANOVA, or Analysis Of Variance, is used to compare the averages or means of two or more populations to better understand how they differ. Watch this tutorial for more.