Arithmetic mean

In mathematics and statistics, the arithmetic mean (pronunciation: /ˌærɪθˈmɛtɪk ˈmiːn/, stress on third syllable of "arithmetic"), or simply the mean or average when the context is clear, is the sum of a collection of numbers divided by the number of numbers in the collection. The collection is often a set of results of an experiment, or a set of results from a survey. The term "arithmetic mean" is preferred in some contexts in mathematics and statistics because it helps distinguish it from other means, such as the geometric mean and the harmonic mean.

In addition to mathematics and statistics, the arithmetic mean is used frequently in fields such as economics, sociology, and history, and it is used in almost every academic field to some extent. For example, per capita income is the arithmetic average income of a nation's population.

While the arithmetic mean is often used to report central tendencies, it is not a robust statistic, meaning that it is greatly influenced by outliers (values that are very much larger or smaller than most of the values). Notably, for skewed distributions, such as the distribution of income for which a few people's incomes are substantially greater than most people's, the arithmetic mean may not accord with one's notion of "middle", and robust statistics, such as the median, may be a better description of central tendency.

Mean (album)

Mean is the fifth and final album by the California-based hard rock band Montrose and released in 1987. It has much more of a glam metal sound than previous Montrose albums.

According to Ronnie Montrose, singer Johnny Edwards and drummer James Kottak were still officially in the band Buster Brown at the time of the recording of Mean. They later played together in the first line-up of the band Wild Horses.

Guitarist Ronnie Montrose and bassist Glenn Letsch played together in the band Gamma both before and after this album.

It features the song "M for Machine" which was written as a potential song for the 1987 American cyberpunk action film RoboCop, directed by Paul Verhoeven.

Drummer James Kottak would go on to join the original line-up of hard rock/glam metal band Kingdom Come, remaining with that band during their most commercially successful period, prior to reconnecting with Edwards in Wild Horses. After leaving Wild Horses, Edwards became the frontman for Foreigner on their 1991 album, Unusual Heat.

Mean (magazine)

Mean (which stands for Music, Entertainment, Art, News) is an American bi-monthly magazine that covers a wide spectrum of pop culture, focusing on celebrities in the fields of music, fashion, art, and film.

History and profile

Mean began as a music zine and alternative magazine in 1997 and continued in that format through 2001, before being re-launched as a national lifestyle publication in 2004.Mean is published by Kashy Khaledi Media and distributed by Curtis Circulation. Its headquarters is in Los Angeles, CA.

Mean has featured a broad assortment of personalities on its cover. Covers have included Viggo Mortensen, Adrien Brody, Emily Blunt, Samuel L. Jackson and Christina Ricci, Emile Hirsch, Javier Bardem, and Ewan McGregor portraying Woody Allen.

References

External links

Balloon

A balloon is a flexible bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, or air. Modern day balloons are made from materials such as rubber, latex, polychloroprene, or a nylon fabric, and can come in many colors. Some early balloons were made of dried animal bladders, such as the pig bladder. Some balloons are used for decorative purposes, while others are used for practical purposes such as meteorology, medical treatment, military defense, or transportation. A balloon's properties, including its low density and low cost, have led to a wide range of applications.

The rubber balloon was invented by Michael Faraday in 1824, during experiments with various gases.

Applications

Decoration or entertainment

Party balloons are mostly made of a natural latex tapped from rubber trees, and can be filled with air, helium, water, or any other suitable liquid or gas. The rubber's elasticity makes the volume adjustable. As shown in the photo to the right, they can come in different colors like the rainbow such as red, orange, yellow, green, blue, purple, etc.

Balloon (game)

Balloon, balloon-ball or wind-ball was a game similar to the modern game of volleyball in which a leather ball would be batted by the fist or forearm to prevent it from touching the ground. The game was played in ancient Rome where it was known as follis — the Latin word for a leather bag. Such a ball made of leather was quite heavy and so protection might be used such as a leather gauntlet or wooden bracer. When rubber became available from the New World, the game was played using lighter balls of inflated rubber and so younger boys could play too.

See also

References

Balloon (aeronautics)

In aeronautics, a balloon is an unpowered aerostat, which remains aloft or floats due to its buoyancy. A balloon may be free, moving with the wind, or tethered to a fixed point. It is distinct from an airship, which is a powered aerostat that can propel itself through the air in a controlled manner.

Many balloons have a basket, gondola or capsule suspended beneath the main envelope for carrying people or equipment (including cameras and telescopes, and flight-control mechanisms).

Principles

A balloon is conceptually the simplest of all flying machines. The balloon is a fabric envelope filled with a gas that is lighter than the surrounding atmosphere. As the entire balloon is less dense than its surroundings, it rises, taking along with it a basket, attached underneath, which carries passengers or payload. Although a balloon has no propulsion system, a degree of directional control is possible through making the balloon rise or sink in altitude to find favorable wind directions.

Dungeon Keeper

Dungeon Keeper is a strategy video game developed by Bullfrog Productions and released by Electronic Arts in July 1997 for the PC. The player builds and manage a dungeon while protecting it from invading 'hero' characters intent on stealing the player's accumulated treasures and killing various monsters.

Gameplay

The player uses a mouse, represented in-game as a hand, to interact with a bar on the left-hand side of the screen, allowing them to select which rooms to build and which spells to cast. The player can also use the hand to pick up creatures and objects in the dungeon and carry them around, allowing for tactics such as gathering an assault force and dropping off the creatures en masse once a foothold has been established. The hand also allows the player to "slap" objects and thereby interact with them: creatures will hurry up when slapped, some traps will be triggered and prisoners in the Torture Chamber can be tortured.

The main game view is in isometric perspective; this view can be zoomed and rotated. The player also has the option of possessing one of their creatures, and seeing the dungeon from that creature's first-person perspective, as well as using their attacks and abilities. The map is divided into a grid of rectangles, most of which are invisible. A smaller part of the map is shown as a minimap in the top left corner of the screen.