The cutoff value of RiskScore > 2 to identify people at risk of macular degeneration
is arbitrary. Suppose we consider changing the cutoff. What are the sensitivity and
specificity if cutoffs of 1, 2, 3, 4, 5, or 6 are used? Make a table of your results.
Assemble an ROC curve based on the table constructed and calculate the area
under the ROC curve- choose the resulted value from the following:
0.92
O 0.74
O 0.78
O 0.85
0.5