What do the yellow lines on the ROC curve and the marks (*) on the ROC table represent?
The yellow line is a straight line tangent to the ROC curve at a 45 degree angle.
This line passes through the point where "sensitivity - (1 - specificity)" is maximized, and this point is marked with an "*" in the ROC table. The "X" column in the ROC table indicates the cutoff value, and the X value in the row marked with an "*" indicates the optimal cutoff value.
FAQ #3003
