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Example 10
E Click OK to complete the model specification for the young group.
E To add a second group, from the menus, choose Analyze > Manage Groups.
E In the Manage Groups dialog box, change the name in the Group Name text box from
Group number 1 to young subjects.
E Click New to create a second group.
E Change the name in the Group Name text box from Group number 2 to old subjects.