ROC curve for Assay result
The ROC curve is a visual index of the accuracy of the assay. The further the curve lies above the reference line, the more accurate the test. Here, the curve is difficult to see because it lies close to the vertical axis.

step  To show more of the detail in the ROC curve, activate the plot by double clicking on it.

step  In the Chart Editor window, activate the vertical axis by double clicking on it.

step  Type 0.9 as the minimum displayed value.

step  Click OK.

step  In the Chart Editor window, activate the horizontal axis by double clicking on it.

step  Type 0.1 as the maximum displayed value.

step  Click OK.

For a numerical summary, see the area under the curve.