PeterRoss
Warranty man
To get 0/13 you have to have really bad luck. Even a rock should answer around a half of the questions correctly by chosing random answers. On the other hand, you can get 0/13 if you know all the correct answers but want to play the fool because of some reason.
I made two test runs of the quiz. At first run I always chose the first answer, at the second run I chose random answer not reading neither question nor answers at all.
There are my results:
1) 5/13 You scored better than 15% of the public, below 77% and the same as 8%.
2) 6/13 You scored better than 23% of the public, below 69% and the same as 8%.
It makes me think that at least 23% of people participated in the survey answered randomly, i.e. didn't know what they answered about at all.