> There was a survey a few years ago of how much more people would be willing to pay for cars that could drive themself, and the median answer was $0. This is b

> There was a survey a few years ago of how much more people would be willing to pay for cars that could drive themself, and the median answer was $0. This is because quite a few people gave a negative number ... Perhaps some people did give a negative answer, but that isn't really why the median is zero. If you asked 100 people, and 51 said $0, and the other 49 said anything else at all (including all saying $1m) then the median would be $0. No negative answers needed.