|
Expected Goals
In association football, expected goals (xG) is a performance metric used to evaluate football team and player performance. It can be used to represent the probability of a scoring opportunity that may result in a goal. It is also used in ice hockey. Metric Association football There is some debate about the origin of the term ''expected goals''. Vic Barnett and his colleague Sarah Hilditch referred to "expected goals" in their 1993 paper that investigated the effects of artificial pitch (AP) surfaces on home team performance in association football in England. Their paper included this observation: Quantitatively we find for the AP group about 0.15 more goals per home match than expected and, allowing for the lower than expected goals against in home matches, an excess goal difference (for home matches) of about 0.31 goals per home match. Over a season this yields about 3 more goals for, an improved goal difference of about 6 goals. Jake Ensum, Richard Pollard and Samuel Tay ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Association Football
Association football, more commonly known as football or soccer, is a team sport played between two teams of 11 players who primarily use their feet to propel the ball around a rectangular field called a pitch. The objective of the game is to score more goals than the opposition by moving the ball beyond the goal line into a rectangular framed goal defended by the opposing side. Traditionally, the game has been played over two 45 minute halves, for a total match time of 90 minutes. With an estimated 250 million players active in over 200 countries, it is considered the world's most popular sport. The game of association football is played in accordance with the Laws of the Game, a set of rules that has been in effect since 1863 with the International Football Association Board (IFAB) maintaining them since 1886. The game is played with a football that is in circumference. The two teams compete to get the ball into the other team's goal (between the posts and under t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Markov Chains
A Markov chain or Markov process is a stochastic process, stochastic model describing a sequence of possible events in which the probability of each event depends only on the state attained in the previous event. Informally, this may be thought of as, "What happens next depends only on the state of affairs ''now''." A countably infinite sequence, in which the chain moves state at discrete time steps, gives a discrete-time Markov chain (DTMC). A continuous-time process is called a continuous-time Markov chain (CTMC). It is named after the Russian mathematician Andrey Markov. Markov chains have many applications as statistical models of real-world processes, such as studying cruise control, cruise control systems in motor vehicles, queues or lines of customers arriving at an airport, currency exchange rates and animal population dynamics. Markov processes are the basis for general stochastic simulation methods known as Markov chain Monte Carlo, which are used for simulating sampl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2010-11 NHL Season
1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. In conventions of sign where zero is considered neither positive nor negative, 1 is the first and smallest positive integer. It is also sometimes considered the first of the infinite sequence of natural numbers, followed by 2, although by other definitions 1 is the second natural number, following 0. The fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MIT Sloan Sports Analytics Conference
The MIT Sloan Sports Analytics Conference (SSAC) is an annual event that provides a forum for industry professionals (executives and leading researchers) and students to discuss the increasing role of analytics in the sports industry. The conference is held in the Boston area and while its location has moved from the MIT campus to higher capacity convention centers, it has always occurred during February or March. Founded in 2006, the conference is co-chaired by Daryl Morey, President of basketball operations for the Philadelphia 76ers, and Jessica Gelman, CEO of KAGR (Kraft Analytics Group), who oversee MIT Sloan students (from the EMS Club) in the planning and operating of the yearly conference. It is the largest student-run conference in the world, attracting students from over 170 different schools and representatives from over 80 professional sports teams in the MLB, NBA, NFL, NHL, MLS, and Premier League. The conference has been sold out every year and has become the premie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goal (ice Hockey)
In ice hockey, a goal is scored when the puck entirely crosses the goal line between the two goal posts and below the goal crossbar. A goal awards one point to the team attacking the goal scored upon, regardless of which team the player who actually deflected the puck into the goal belongs to (see also own goal). Typically, a player on the team attempting to score shoots the puck with their stick towards the goal net opening, and a player on the opposing team called a goaltender tries to block the shot to prevent a goal from being scored against their team. The term goal may also refer to the structure in which goals are scored. The ice hockey goal is rectangular in shape; the front frame of the goal is made of steel tube painted red (blue in the ECHL because of a sponsorship deal with GEICO) and consists of two vertical goalposts and a horizontal crossbar. A net is attached to the back of the frame to catch pucks that enter the goal and also to prevent pucks from entering it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shot On Goal (ice Hockey)
In ice hockey, a shot on goal is a shot that directs the puck towards the net and either goes into the net for a goal or is stopped by the goaltender In ice hockey, the goaltender (commonly referred to as the goalie) is the player responsible for preventing the hockey puck from entering their team's net, thus preventing the opposing team from scoring. The goaltender mostly plays in or near t ... for a save. A shot that is deflected wide or blocked by an opponent does not count as a shot on goal; it is recorded as a blocked shot. The player who blocks the shot is credited with a 'blocked shot', and the player who shoots the puck is credited with an 'attempt blocked'. Shots that sail wide or high of the net, and shots that hit the goalpost or crossbar, are not counted as shots on goal; they are counted as 'missed shots'. Additionally, if a goaltender stops a puck that is going wide or high anyway, it is recorded as a 'missed shot'. Since it is not counted as a shot on goal, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Premier League
The Premier League (legal name: The Football Association Premier League Limited) is the highest level of the men's English football league system. Contested by 20 clubs, it operates on a system of promotion and relegation with the English Football League (EFL). Seasons typically run from August to May with each team playing 38 matches (playing all 19 other teams both home and away). Most games are played on Saturday and Sunday afternoons, with occasional weekday evening fixtures. The competition was founded as the FA Premier League on 20 February 1992 following the decision of clubs in the Football League First Division to break away from the Football League, founded in 1888, and take advantage of a lucrative television rights sale to Sky UK, Sky. From 2019 to 2020, the league's accumulated television rights deals were worth around £3.1 billion a year, with Sky and BT Group securing the domestic rights to broadcast 128 and 32 games respectively. The Premier League is a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2010–11 Premier League
The 2010–11 Premier League (known as the Barclays Premier League for sponsorship reasons) was the 19th season of the Premier League since its establishment in 1992. The 2010–11 fixtures were released on 17 June 2010 at 09:00 BST. The season began on 14 August 2010, and ended on 22 May 2011. Chelsea were the defending champions. Manchester United secured the title with a 1–1 draw away to Blackburn Rovers on 14 May 2011. This was their nineteenth English league title, breaking a tie with Liverpool which had stood since Manchester United won their eighteenth title in 2009. Manchester United, Chelsea, Manchester City and Arsenal all secured a berth for the 2011–12 UEFA Champions League, while Tottenham Hotspur qualified for the 2011–12 UEFA Europa League via league position. At the bottom, West Ham United, Blackpool, and Birmingham City were relegated to the Championship. Rule changes The Premier League introduced a cap on the number of players in a squad. From this seas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sarah Rudd
Sarah Rudd is one of the early pioneers of sports analytics applied to soccer. In 2011, Rudd developed a method, based on Markov Chains, for evaluating the performance of players. This method was later adopted by several other companies, academics and bloggers to evaluate actions from soccer event data. Soon after presenting her work, Rudd worked for startup StatsDNA which was acquired by Arsenal FC in 2013. She is currently head of Analytics and Software Development at the Arsenal FC Arsenal Football Club, commonly referred to as Arsenal, is a professional football club based in Islington, London, England. Arsenal plays in the Premier League, the top flight of English football. The club has won 13 league titles (inclu ... Data Analytics group. Her work is reported to have been highly influential within the club. References {{DEFAULTSORT:Rudd, Sarah Year of birth missing (living people) Arsenal F.C. non-playing staff Living people Sports statisticians Women stat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
