The page will display the current questions attached to the current User Group you are editing. This page is very similar in functionality to how the category question assignments are made within the Categories menu. If you now click on the "Add New Question" link you will be able to give your question a name, explanation, choice, 'other' box, and display order, just as you do within the category question setup. Click 'save' and your question will now appear on the 'edit group questions' page and the User Group Edit page.