In the fields of science, engineering, industry and statistics, the accuracy of a measurement system is the degree of closeness of measurements of a quantity to that quantity's actual (true) value. The precision of a measurement system, also called reproducibility or repeatability, is the degree to which repeated measurements under unchanged conditions show the same results. Although the two words reproducibility and repeatability can be synonymous in colloquial use, they are deliberately contrasted in the context of the scientific method.

A measurement system can be accurate but not precise, precise but not accurate, neither, or both. For example, if an experiment contains a systematic error, then increasing the sample size generally increases precision but does not improve accuracy. The result would be a consistent yet inaccurate string of results from the flawed experiment. Eliminating the systematic error improves accuracy but does not change precision.

A measurement system is designated valid if it is both accurate and precise. Related terms include bias (non-random or directed effects caused by a factor or factors unrelated to the independent variable) and error (random variability).

The Cure are an English alternative rock band formed in Crawley, West Sussex in 1976. The band has experienced several line-up changes, with frontman, vocalist, guitarist and principal songwriter Robert Smith being the only constant member. The Cure first began releasing music in the late 1970s with its debut album Three Imaginary Boys (1979); this, along with several early singles, placed the band as part of the post-punk and New Wave movements that had sprung up in the wake of the punk rock revolution in the United Kingdom. During the early 1980s, the band's increasingly dark and tormented music helped form the gothic rock genre.

After the release of Pornography (1982), the band's future was uncertain and Smith was keen to move past the gloomy reputation his band had acquired. With the 1982 single "Let's Go to Bed" Smith began to place a pop sensibility into the band's music (as well as a unique stage look). The Cure's popularity increased as the decade wore on, especially in the United States where the songs "Just Like Heaven", "Lovesong" and "Friday I'm in Love" entered the Billboard Hot 100 chart. By the start of the 1990s, The Cure were one of the most popular alternative rock bands in the world. The band is estimated to have sold 27 million albums as of 2004. The Cure have released thirteen studio albums, 10 EPs and over thirty singles during the course of their career. Since 2010, they have been working on a fourteenth studio album.

Sir Philip Anthony Hopkins, CBE (born 31 December 1937), best known as Anthony Hopkins, is a Welsh actor of film, stage and television, and a composer. Considered to be one of the greatest living actors, Hopkins is perhaps best known for his portrayal of Hannibal Lecter in The Silence of the Lambs. Other prominent film credits include The Lion in Winter, Magic, The Elephant Man, 84 Charing Cross Road, Dracula, Legends of the Fall, The Remains of the Day, Amistad, Nixon, The World's Fastest Indian, and Fracture. Hopkins was born and brought up in Wales. Retaining his British citizenship, he became a U.S. citizen on 12 April 2000. Hopkins' films have spanned a wide variety of genres, from family films to horror. As well as his Academy Award, Hopkins has also won three BAFTA Awards, two Emmys and the Cecil B. DeMille Golden Globe Award. Hopkins was knighted by Queen Elizabeth II in 1993 for services to the arts. He received a star on the Hollywood Walk of Fame in 2003, and was made a Fellow of the British Academy of Film and Television Arts in 2008.

Russell Ira Crowe (born 7 April 1964) is a New Zealand born Australian actor, film producer and musician. He came to international attention for his role as Roman General Maximus Decimus Meridius in the 2000 historical epic film Gladiator, directed by Ridley Scott, for which he won an Academy Award for Best Actor, a Broadcast Film Critics Association Award for Best Actor, an Empire Award for Best Actor and a London Film Critics Circle Award for Best Actor and ten further nominations for Best Actor. Crowe appeared as the tobacco firm whistle blower Jeffrey Wigand in the 1999 film The Insider, for which he received five awards as Best Actor and seven nominations in the same category. In 2001, Crowe's portrayal of mathematician and Nobel Prize winner John F. Nash in the biopic A Beautiful Mind brought him numerous awards, including an BAFTA Award for Best Actor in a Leading Role, a Golden Globe Award for Best Actor category Motion Picture Drama and a Screen Actors Guild Award for Outstanding Performance by a Male Actor in a Leading Role.

Bruce Lee (born Lee Jun-fan; 27 November 1940 – 20 July 1973) was a Chinese AmericanHong Kong actor,martial arts instructor, philosopher, film director, film producer, screenwriter, and founder of the Jeet Kune Do martial arts movement. He is widely considered by many commentators, critics, media and other martial artists to be the most influential martial artist and pop culture icon of the 20th Century. He is often credited with changing the way Asians were presented in American films.

Lee was born in San Francisco to parents of Hong Kong heritage but was raised in Hong Kong until his late teens. Lee returned to the United States at the age of 18 to claim his U.S. citizenship and receive his higher education. It was during this time that he began teaching martial arts, which soon led to film and television roles.

His Hong Kong and Hollywood-produced films elevated the traditional Hong Kong martial arts film to a new level of popularity and acclaim, and sparked a major surge of interest in Chinese martial arts in the West in the 1970s. The direction and tone of his films changed and influenced martial arts and martial arts films in Hong Kong and the rest of the world, as well. He is noted for his roles in five feature-length films: Lo Wei's The Big Boss (1971) and Fist of Fury (1972); Way of the Dragon (1972), directed and written by Lee; Warner Brothers' Enter the Dragon (1973) and The Game of Death (1978), both directed by Robert Clouse.