Whiteboard (2) button gives you opportunity to view the results of the quiz on whiteboard. This dynamic representation of the results is very convenient for post-assignment work out to analyze the results.
If you hover mouse pointer over the cells with questions numbers you can read the question, answer cells show the answer the same way (3).
Red cell indicates wrong answer, green one - correct, grey cell shows the question which wasn't represented in the quiz.
Percentage results indicate average for all attempts (bottom of the table) and total score (end of the table).
Ypu can also download (4) the results as a spreadsheet.