Neutrosophic and Information Fusion NIF 2836-7863 10.54216/NIF https://www.americaspg.com/journals/show/3209 2023 2023 Mutah University, Faculty of Science, Jordan Ahmad Ahmad A condensed study will be done to compare the ordinary estimators. In particular, the maximum likelihood estimator and the robust estimator, to estimate the parameters of the mixed model of order one, namely BARMA (1, 1). Simulation experiments will be applied for varieties of BARMA (1, 1) based on using small, moderate, and large sample sizes, where some new results were obtained. MAPE was used as a statistical criterion for comparison. 2024 2024 09 17 10.54216/NIF.040202 https://www.americaspg.com/articleinfo/39/show/3209