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The computed probability of at least two people sharing a birthday versus the number of people. In probability theory, the birthday problem asks for the probability that, in a set of n randomly chosen people, at least two will share a birthday. The birthday paradox refers to the counterintuitive fact that only 23 people are needed for that ...
A probabilistic generalization of the pigeonhole principle states that if n pigeons are randomly put into m pigeonholes with uniform probability 1/m, then at least one pigeonhole will hold more than one pigeon with probability. where (m)n is the falling factorial m(m − 1) (m − 2)... (m − n + 1). For n = 0 and for n = 1 (and m > 0), that ...
Dunbar's number is a suggested cognitive limit to the number of people with whom one can maintain stable social relationships—relationships in which an individual knows who each person is and how each person relates to every other person. [ 1 ][ 2 ] This number was first proposed in the 1990s by British anthropologist Robin Dunbar, who found ...
The Wisdom of Crowds: Why the Many Are Smarter Than the Few and How Collective Wisdom Shapes Business, Economies, Societies and Nations, published in 2004, is a book written by James Surowiecki about the aggregation of information in groups, resulting in decisions that, he argues, are often better than could have been made by any single member of the group.
Riis himself describes the miserable conditions of the room: In a room not thirteen feet either way slept twelve men and women, two or three in bunks set in a sort of alcove, the rest on the floor. A kerosene lamp burned dimly in the fearful atmosphere, probably to guide other and later arrivals to their beds, for it was only just past midnight.
An overcrowded household is defined as one which has fewer rooms than the sum of: [7] one room for the household; one room per couple in the household; one room for each single person aged 18 or more; one room per pair of single people of the same gender between 12 and 17 years of age; one room for each single person between 12 and 17 years of ...
Size (the number of people involved) is an important characteristic of the groups, organizations, and communities in which social behavior occurs. [1] When only a few persons are interacting, adding just one more individual may make a big difference in how they relate. As an organization or community grows in size it is apt to experience ...
Lightbulb joke. A lightbulb joke is a joke cycle that asks how many people of a certain group are needed to change, replace, or screw in a light bulb. Generally, the punch line answer highlights a stereotype of the target group. There are numerous versions of the lightbulb joke satirizing a wide range of cultures, beliefs, and occupations. [1][2]