Data set A is a collection of data. In the case of tabular data, a data set corresponds to one or more data set database tables, where every column of a table represents a particular variable, and each row corresponds to a given record of the data set in question. The data set lists values for each of the variables, such as height and weight of an object, for each member of the data set. Each value is known as a datum. Data sets can also consist of a collection of documents or files. In the open data discipline, data set is the unit to measure the information released in a public open data repository. The European Open Data portal aggregates more than half a million data sets. In this field other definitions have been proposed, but currently there is not an official one. Some other issues increases the difficulty to reach a consensus about it. PropertiesSeveral characteristics define a data set's structure and properties. These include the number and types of the attributes or variables, and various statistical measures applicable to them, such as standard deviation and kurtosis. The values may be numbers, such as real numbers or integers, for example representing a person's height in centimeters, but may also be nominal data, for example representing a person's ethnicity. More generally, values may be of any of the kinds described as a level of measurement. For each variable, the values are normally all of the same kind. However, there may also be missing values, which must be indicated in some way. In statistics, data sets usually come from actual observations obtained by sampling a statistical population, and each row corresponds to the observations on one element of that population. Data sets may further be generated by algorithms for the purpose of testing certain kinds of software. Some modern statistical analysis software such as SPSS still present their data in the classical data set fashion. If data is missing or suspicious an imputation method may be used to complete a data set. Classic data setsSeveral classic data sets have been used extensively in the statistical literature:
Popular articles 2022 FIFA World Cup - The 2022 FIFA World Cup is scheduled to be the 22nd edition of the FIFA World Cup, the quadrennial international men's association football championship contested by the national teams of the member... FIFA World Cup - international association football competition contested by the senior men's national teams of the members of the Fédération Interna... Cristiano Ronaldo - Portuguese professional footballer who plays as a forward for club Juventus and captains the Portugal national team. Often considered the best player in the ... Guillermo Ochoa - Mexican professional footballer who plays as a goalkeeper for Liga MX club América and the Mexico national team. Ochoa made h... Qatar - country located in Western Asia, occupying the small Qatar Peninsula on the northeastern coast of the Arabian Peninsula. Its sole land border is with nei... Hervé Renard - French football coach and former professional player who is manager of Saudi Arabia. He has previously been the manager of the Zambian national team, with whom he won the 2012 Afr... Saudi Arabia national football team - The Saudi Arabia national football team represents Saudi Arabia in men's international football and The team's colours are green and white. Saudi Arabia are known as Al-Suqour and Al-Akhdhar , Th... Popular movies Black Panther 2 (film project) - part of Marvel Cinematic Universe. The film project starred Chadwick Boseman. Director of the film projec... Avatar 2 - upcoming American science fiction film directed, produced, edited, and co-written by James Cameron, produced by 20th Century Studios. It is the second film in the Avatar franchise, ... Avatar (2009 film) - 2009 American epic science fiction film directed, written, produced, and co-edited by James Cameron and stars Sam Worthington, Zoe Saldana, Stephen Lang, Michelle Rodriguez, and Sigourne... Disenchanted (film project) - Disenchanted - upcoming film by Walt Disney Pictures. Directors of the film project - Adam Shankman, Anne Fletcher. Scenarists of the film project - J. David Stem, Jessie Nelson, David N. Weiss.... Black Panther (film) - 2018 American superhero film based on the Marvel Comics character of the same name. Produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures, it is the 18... Popular video games God of War (2018 video game) - action-adventure game developed by Santa Monica Studio and published by Sony Interactive Entertainment. Released on April 20, 2018, for the PlayStation 4, it is the eighth installme... Minecraft - sandbox video game developed by Mojang Studios. Created by Markus "Notch" Persson in the Java programming language and released as a public alpha for personal computers in 2... Roblox - online game platform and game creation system that allows users to program games and play games created by other users. Founded by David Baszucki and Erik Cassel in 2004 and released in... God of War (2005 video game) - action-adventure game developed by Santa Monica Studio and published by Sony Computer Entertainment. First released on March 22, 2005, for the PlayStation 2 console, it is the first... Call of Duty: Modern Warfare 2 - 2009 first-person shooter game developed by Infinity Ward and published by Activision. It is the sixth installment in the Call of Duty series and the direct seq... Grand Theft Auto V - 2013 action-adventure game developed by Rockstar North and published by Rockstar Games. It is the first main entry in the Grand Theft Auto series since 2008's Grand Theft ... Popular books Book of Revelation - The Book of Revelation is the final book of the New Testament, and consequently is also the final book of the Christian Bible. Its title is derived from the first word of the Koine Greek text: apok... Book of Genesis - account of the creation of the world, the early history of humanity, Israel's ancestors and the origins... Michelin Guide - Michelin Guides are a series of guide books published by the French tyre company Michelin for more than a century. The term normally refers to the annually published Michelin Red Guide , the oldest... Gospel of Matthew - The Gospel According to Matthew is the first book of the New Testament and one of the three synoptic gospels. It tells how Israel's Messiah, rejected and executed in Israel, pronounces judgement on ... Ecclesiastes - Ecclesiastes is one of 24 books of the Tanakh , where it is classified as one of the Ketuvim . Originally written c. 450–200 BCE, it is also among the canonical Wisdom literature of the Old Tes... Psalms - The Book of Psalms , commonly referred to simply as Psalms , the Psalter or "the Psalms", is the first book of the Ketuvim , the third section of the Hebrew Bible, and thus a book of th... Little Nemo - fictional character created by American cartoonist Winsor McCay. He originated in an early comic strip by McCay, Dream of the Rarebit Fiend , before receiving his own spin-off seri... Popular television series
The Walking Dead (TV series) - American post-apocalyptic horror television series for AMC based on the comic book series by Robert Kirkman, Tony Moore, and Charlie Adlard. The series features a large ensemb... The Crown (TV series) - historical drama web television series about the reign of Queen Elizabeth II, created and principally written by Peter Morgan, and produced by Left Bank Pictures and Sony Pictures Tel... Elite (TV series) - Spanish thriller teen drama web television series created for Netflix by Carlos Montero and Darío Madrona. The series is set in Las Encinas, a fictional elite secondary school and revolv... Mighty Morphin Power Rangers - American superhero children's television series that premiered on August 28, 1993, on the Fox Kids programming block. It is the first entry of the Power Rangers ... Dead to Me (TV series) - American dark comedy web television series created by Liz Feldman and executively produced by Feldman, Will Ferrell, Adam McKay, and Jessica Elbaum. The series premiered on May 3, 2... Untitled Star Wars series - Untitled Star Wars series - Upcoming Star Wars live-action series about Cassian Andor. It was presented as space opera, drama (film and television). The television series starred Diego Luna.... Manifest (TV series) - American supernatural drama television series, created by Jeff Rake, that premiered on September 24, 2018, on NBC. The series centers on the passengers and crew of a commercial airlin...
OWIKI.org. Text is available under the Creative Commons Attribution-ShareAlike License.