# Mobile Network Operators' Assessment Based on Drive-Test Campaign in Urban Area for iPerf Scenario
## Appendix C  
Section 4 shows the relationships between the QoS and radio signal metrics. The results are presented in two forms, i.e., the measured data and regression lines, which we may describe with a general formula:  
\[Y=A\cdot X+B+\xi_{\sigma}, \tag{10}\]  
where \(X\) and \(Y\) are two analyzed QoSs or signal metrics (described in Section 2.4) considered as abscissa and ordinate variables, respectively; \(A\) and \(B\) are line parameters, i.e., a slope (gradient) and ordinate axe intercept of the line, respectively; and \(\xi_{\sigma}\) is a zero-mean normal random variable with a deviation equal to \(\sigma\). In Tables 14 and 15, we show the parameter values of the regression lines presented in Sections 4 and 5 for all MNOs, TCP and UDP, respectively. * [PERSON] and [PERSON] (2020) [PERSON]; [PERSON] [PERSON] Multimedia Quality of Experience (QoE): Current Status and Future Direction. _Future Internet_**2020**, _12_, 121. [CrossRef]
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