Changing the confidence level

You can adjust the statistical calculations during a Positional Accuracy Assessment session by modifying the confidence level. This is the level of confidence for the evaluation layer. The value for this field can be 90, 95, or 99. The statistics are recalculated appropriately when this value is changed.

When the confidence level is changed, the statistics for the active points are automatically recalculated.

Steps:

1. Start ArcMap.
2. If necessary, load data in the map.
3. On the main menu, click Customize > Toolbars > Data Reviewer.
4. On the Data Reviewer toolbar, click Data Reviewer > Positional Accuracy Assessment.

   The Positional Accuracy Assessment toolbar appears.

5. Start a PAAT session.
6. Click the Show Results button on the Positional Accuracy Assessment toolbar.

   The Positional Accuracy Session Results dialog box appears.
7. In the Settings area of the Session Results tab, click the Confidence Level drop-down arrow to change the confidence level value.

   The confidence level changes for the statistics.

8. Click Close.