Al-Ghmadi, Mohammed, Ezz Abdelfattah, and Ahmed Ezz. “The Effect of Weighting Data on the Goodness of Fit Indicators of the Six Sigma Structural Equation Modeling”. Journal of Mathematics and Statistics Studies 2, no. 2 (November 10, 2021): 36–49. Accessed November 30, 2025. https://al-kindipublishers.org/index.php/jmss/article/view/2312.