Sigma (/ˈsɪɡmə/ SIG-mə; uppercase Σ, lowercase σ, lowercase in word-final position ς; Ancient Greek: σίγμα) is the eighteenth letter of the Greek alphabet...

Sigma Sigma Sigma (ΣΣΣ), also known as Tri Sigma, is a national American women's sorority. Sigma Sigma Sigma is a member of the National Panhellenic Conference...

Sigma Sigma (ΣΣ) is a men's upperclassmen honorary fraternity at the University of Cincinnati. Founded in 1898, it is the oldest of such organizations...

Six Sigma (6σ) is a set of techniques and tools for process improvement. It was introduced by American engineer Bill Smith while working at Motorola in...

represented in mathematical texts and equations by the lowercase Greek letter σ (sigma), for the population standard deviation, or the Latin letter s, for the...

-1\sigma \leq X\leq \mu +1\sigma )&\approx 68.27\%\\\Pr(\mu -2\sigma \leq X\leq \mu +2\sigma )&\approx 95.45\%\\\Pr(\mu -3\sigma \leq X\leq \mu +3\sigma...

Sigma Sigma Rho (ΣΣΡ) is a South Asian interest collegiate sorority in the United States. It was established at St. John's University in 1998. It is a...

Retrieved 2009-07-23. "Gamma Sigma Sigma - Service". Gamma Sigma Sigma. "Gamma Sigma Sigma - Our Organization". Gamma Sigma Sigma. Benton Harbor News Palladium...

In chemistry, sigma bonds (σ bonds) or sigma overlap are the strongest type of covalent chemical bond. They are formed by head-on overlapping between atomic...

parameter σ 2 {\textstyle \sigma ^{2}} is the variance. The standard deviation of the distribution is σ {\textstyle \sigma } (sigma). A random variable with...

Two Sigma Investments, LP is a New York City-based hedge fund that uses a variety of technological methods, including artificial intelligence, machine...

to be assertive, particularly with women. In Internet culture, the term sigma male is also frequently used, gaining popularity c. 2021, but has since...

Sigma-Aldrich (formally MilliporeSigma) is an American chemical, life science, and biotechnology company owned by the multinational chemical conglomerate...

Sigma Tau Sigma (ΣΤΣ) is a local honorary fraternity for textiles. It was established in 1929 at North Carolina State University in Raleigh, North Carolina...

Phi Sigma Sigma (ΦΣΣ), colloquially known as Phi Sig, was the first collegiate nonsectarian sorority to allow membership of women of all faiths and backgrounds...

Sigma Mu Sigma (ΣΜΣ) is a former American college fraternity founded in 1921 at Tri-State University. Sigma Mu Sigma was historically an all-male social...

Delta-sigma (ΔΣ; or sigma-delta, ΣΔ) modulation is an oversampling method for encoding signals into low bit depth digital signals at a very high sample-frequency...

A sigma factor (σ factor or specificity factor) is a protein needed for initiation of transcription in bacteria. It is a bacterial transcription initiation...

new SIGMA designs released in early 2015 these are the: SIGMA 8313 SIGMA 8011 SIGMA 7613 SIGMA 6610 They are likely to be part of the Compact SIGMA series...

In mathematical analysis and in probability theory, a σ-algebra ("sigma algebra"; also σ-field, where the σ comes from the German "Summe") on a set X...

Sigma Chi (ΣΧ) International Fraternity is one of the largest of North American social fraternities. The fraternity has 244 active undergraduate chapters...

Ferrari Sigma, also known as the Ferrari Sigma Grand Prix or Pininfarina Sigma, was a Formula One show car built in 1969 by Pininfarina. The Sigma, unveiled...

Sigma Sigma Phi (ΣΣΦ or SSP), is the national osteopathic medicine honors fraternity for medical students training to be Doctors of Osteopathic Medicine...

Sigma 6 may refer to: G.I. Joe: Sigma 6, a line of military-themed action figures and toys SDS Sigma 6, one of the SDS Sigma series of computers made by...

Sigma Derby is an electro-mechanical horse race used for gambling manufactured by Japanese manufacturer Sigma Game Inc. and introduced in 1985. Up to...

Delta Sigma Theta Sorority, Inc. (ΔΣΘ) is a historically African American sorority. The organization was founded by college-educated women dedicated to...

Sigma Xi, The Scientific Research Honor Society (ΣΞ) is a non-profit honor society for scientists and engineers. Sigma Xi was founded at Cornell University...

Sigma Phi Sigma (ΣΦΣ) was an American national collegiate fraternity founded in 1908 at the University of Pennsylvania. It ceased operations during WWII...

Sigma 7 may refer to: the callsign of the spacecraft used in the 1962 Mercury-Atlas 8 mission the SDS Sigma 7 computer, made by Scientific Data Systems...

Sigma Corporation (株式会社シグマ, Kabushiki-gaisha Shiguma) is a Japanese company, manufacturing cameras, lenses, flashes and other photographic accessories...