Left panel: confidence regions derived from L_vc (colored areas) and L_true (solid and dashed lines) with x^abd5. Right panel: confidence regions derived from L_vc (colored areas) and p-value analysis (solid and dashed lines). The contours from L_true and p-value analysis are noisy due to a relatively low N for probability estimation. We notice that L_vc and L_true yield very similar results.