I am attaching three different residual plots. I am trying to determine whether heteroskedasticity is present. I don't believe I see any pattern indicative of heteroskedasticity (nonconstant variance). I know it can be difficult to detect - do you see any indication of this?© BrainMass Inc. brainmass.com December 24, 2021, 4:41 pm ad1c9bdddf
Please see attached file.
Your residual plots appear to be stationary which is a good indication of not having heteroskedasticity. But if you want to be sure in a quantitative basis try any test for randomness on your residual sequence. One good test in the autocorrelation function because a random sequence will have only a significant lag cero value ...
The solution discusses whether heteroskedasticity is present.