Figure 2.

The mean of confidence intervals' coverage of the conventional method and the proposed bootstrap method. The columns' heading shows the value of ${\rho }_y$ and the rows' heading indicates the value of ${\rho }_s$. In this graph, the x-axis indicates the method used to construct the confidence intervals and the y-axis shows the coverage percentage. The error bars show $\pm 2\times$ the standard deviation of coverage of confidence intervals for 8 years.