You can determine which quiz attempts are included in the analysis by setting the following parameters:
It may be convenient to analyze just one quiz attempt for each user. This particular attempt may be the one with the highest overall score, the first attempt or the last attempt of those performed. Alternatively all attempts data may be combined for a cumulative analysis.
Rejection of low scores:
Sometimes users are just browsing the quiz, exploring it, and not going through it for a grade. It is common that such 'trial' attempts get very low scores. These attempts can be excluded from analysis by setting a low limit for the score of the attempts to analyze. This limit is specified as a percentage (0-100) of the maximum grade achievable in the quiz.
You choose how many questions per page you want to see displayed on screen.