Analyzing Viscosity Models: Athabasca Bitumen Case Study

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The study analyzes bitumen viscosity, leveraging experimental data and modeling temperature and pressure impacts. OLS regression highlights statistical significance but raises concerns about heteroscedasticity and misleading high R² values. Homoscedasticity issues and limitations in cold conditions challenge result reliability. Adopting Weighted Least Squares (WLS) is proposed to improve model precision with enhanced utility for engineering applications.