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Frances Cope
Frances Cope, also known as Frances Thorndike (August 19, 1902 - May 14, 1982), was an American mathematician who published on irregular differential equations. The Thorndike nomogram, a two-dimensional diagram of the Poisson distribution, is named for her. Education and career Born Elizabeth Frances Thorndike in New York City and known as Frances, her parents were Elizabeth (Moulton) Thorndike and Edward L. Thorndike, an educational psychologist who taught at Teachers College, Columbia University. Frances was educated at Horace Mann School in New York and at Drum Hill High School in Peekskill. She graduated from Vassar College in 1922 and earned her master's degree in mathematics from Columbia University in 1925. In a 1926 paper, she first published a two-dimensional diagram of the Poisson distribution that is now named the Thorndike nomogram after her. She worked for several years as an engineering assistant at American Telephone and Telegraph Company (1922–24, 1925–27) befo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poisson Distribution
In probability theory and statistics, the Poisson distribution is a discrete probability distribution that expresses the probability of a given number of events occurring in a fixed interval of time or space if these events occur with a known constant mean rate and Statistical independence, independently of the time since the last event. It is named after France, French mathematician Siméon Denis Poisson (; ). The Poisson distribution can also be used for the number of events in other specified interval types such as distance, area, or volume. For instance, a call center receives an average of 180 calls per hour, 24 hours a day. The calls are independent; receiving one does not change the probability of when the next one will arrive. The number of calls received during any minute has a Poisson probability distribution with mean 3: the most likely numbers are 2 and 3 but 1 and 4 are also likely and there is a small probability of it being as low as zero and a very smal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
