Here you can select which Rounds are to be used when the Statistics are calculated:

You see a list of all Rounds stored for the Player in the Mobile Golf Scorer™ Database with Date and Course played on.
To include a Round in the Statistics, check the Checkbox left of the Round, to exclude the Round, uncheck the Checkbox.

In order to selects Rounds within a Date Range or played on a certain Course, tap on .

To select a different Statistic, tap on the corresponding Tab on the Top of the Screen. To leave the Statistics, tap on Exit.