In the preparation phase, the simulation modeler performs Morris sensitivity analysis to fixate insignificant model inputs and to identify non-linearity and interaction effects.
After controlling for additional treatment-related covariates, the volume effect on hospital mortality attenuated and became insignificant (Model 2).
When core self-evaluations are included in regression analyses, core self-evaluations are significantly and positively related to proactive behavior (Model 3, β = 0.12, p < 0.10), but the significant effect of authentic leadership and proactive behavior become insignificant (Model 3, β = 0.10, n.s).s
When psychological empowerment is included in regression analyses, psychological empowerment is marginally significantly and positively related to proactive behavior (Model 4, β = 0.11, p < 0.10), but the significant effect of authentic leadership and proactive behavior becomes insignificant (Model 4, β = 0.09, n.s).s
However, using the transformed polynomial model the estimate for correlation decreased to a very low value of 0.012 and resulted in an insignificant model.
When psychological empowerment is included in regression analysis, psychological empowerment is significantly and positively related to core self-evaluations (Model 9, β = 0.20, p < 0.01), but the significant effect of authentic leadership and core self-evaluations becomes insignificant (Model 9, β = 0.08, n.s).s
Regression study and ANOVA with a p < 0.05 indicate the significance of the model terms, and p values > 0.1 indicates the insignificant model terms.
Insignificant model terms, which have limited influence, were excluded from the study to improve the models.
However, when controlling for other variables, the effect turns insignificant (model 2.2).
By ostracizing the insignificant model term, B 2 with Prob > F > 0.10, the final regression model of polynomial equation of NO3 − N removal in terms of coded and actual factors could be presented as in Eqs.
