You should visit the good judgment project website. They've studied this for a while and have documentation outlining and explaining their claims. The idea is

You should visit the good judgment project website. They've studied this for a while and have documentation outlining and explaining their claims. The idea is not that an untrained mass of people are necessarily better than experts. Instead, it's that some people, with training, can learn how to make good predictions about many different fields. These predictions exceed the predictions of domain experts.