Hi There,
The default is 95% confidence intervals. To specify an alternative confidence interval you can set the alpha option to your significance level e.g. alpha=0.01...
proc arima data=elvennine;
identify var=emp(1,12);
estimate q=(1)(12) noconstant printall plot;
forecast lead=12 out=pred alpha=0.01;
run;
Check out the PROC ARIMA syntax at
http://support.sas.com/documentation/cdl/en/etsug/63348/HTML/default/viewer.htm#etsug_arima_sect024....
Hope this is what you were after.
Cheers,
Michelle
//Contact me to learn how Metacoda software can help keep your SAS platform secure - https://www.metacoda.com