Box jenkins problem trying find to best fit model

[TomDoan]

If you're confused about how to deal with the insignificant MA(2) term, you should talk to a faculty member.

[GaryM26]

You might want to try using t rather than Normal errors (DISTRIB=T) option, given the high kurtosis on the standardized residuals.

Hi Tom, When your using the T distribution option, under it in the shape box what do i put? Is it the degrees of freedom. my Obs are 1999

[TomDoan]

How many data points you have has nothing to do with that. Leave it blank and let it be estimated.