A comparative study between ARIMA and ARIMAX in Forecasting Gross Domestic Product (GDP) in Nigeria. KASU JOURNAL OF MATHEMATICAL SCIENCE (Maths Access), [S. l.], v. 2, n. 2, p. Page: 30–42, 2025. Disponível em: https://mathsaccess.org.ng/index.php/kjms/article/view/47. Acesso em: 10 jun. 2026.