“Using the ARIMA Model to Predict the Number of Deaths Classified into Three Age Groups in Diyala Governorate” (2025) Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), 56(1), pp. 9–27. doi:10.55562/jrucs.v56i1.2.