Law of small numbers is a kind of psychological deviation, which means that people regard the probability distribution of an event in a small sample as an overall distribution, grasp a feature of the problem and directly infer the result, without considering the real probability of this feature and other reasons related to the feature
A survey of 100 people on the streets of Beijing believes that house prices in Beijing are very high, so people all over Beijing believe that house prices in Beijing are very high reflects the Law of small numbers according to the above definition.