Regression diagnostics and outliers
REGRESSION
The twenty datasets obtained by multiple imputation were checked individually [Individuals with high leverage (Leverage > 3*p/n [In the final adjusted models, regression diagnostic showed a significant deviation from normality when WTP=$0/AFD, as expected due to the skewed nature of cost data (An alpha of 0.05 was used to determine statistical significance. IBM SPSS 24 was used to carry out the analysis following the intention-to-treat principle.