Oyeyemi, G. M.Adewara, A. A.Ige, O. S.Ibraheem, B. A.2023-07-192023-07-192009ICASTOR Journal of Mathematical Sciences0974-1958https://uilspace.unilorin.edu.ng/handle/20.500.12484/11574In multivariate regression analysis of complex survey design, adjustment for both stratification and clustering variable depends on whether the variables are exogenous or endogenous in the model. Adjustments are found to be necessary if the variables are exogenous in the models, especially adjustment for clustering is found to be more important than that of stratificationenAdjustment, Complex survey, Endogenous, Exogenous, Cluster, StrataArticle