does armama require normally distributed errors which model is generally distributed do rimax model require normally distributed errors do arima models require normally distributed errors when using armama model does it require normally distributed input data does arima require normally distributed errors or normally distributed input data? what type of data does ramax require does arima require normally distributed error? what kind of input data does arima require arima model iii requires normally distributed errors what is normally distributed input does armama require normally distributed errors does rimax require normally distributed errors? does arima need normally distributed data does arima use normally distributed data does arima require normally distributed errors or normally distributed input data do the armama models require normally distributed errors? why does arima need normally distributed input is arima normally distributed or normally distributed? is an arima model normally distributed