1
: the 18th letter of the Greek alphabet see Alphabet Table
Examples of sigma in a Sentence
Recent Examples on the Web
Pros and Cons of Being a Sigma If your child identifies as a sigma, what exactly does that mean?
—
Kara Nesvig, Parents, 13 Aug. 2024
The fruit fly where wMel comes from also carries sigma-virus, a type that Wolbachia does nothing to protect against.
—Ed Yong, Discover Magazine, 8 Feb. 2012
According to the group’s calculations, the Planck data point to a closed universe with a standard deviation of 3.5 sigma (a statistical measurement that means about 99.8% confidence that the result isn’t due to random chance).
—Rafi Letzter, Scientific American, 5 Nov. 2019
Thomson and his team must reach five-sigma certainty to definitively claim a discovery.
—Quanta Magazine, 14 May 2015
Historically, most industrial companies operate between three and four sigma, making them between 93% and 99.3% defect-free (these figures can vary slightly depending on the statistical model).
—Oliver Staley, Quartz at Work, 3 Sep. 2019
The gold standard for discovery is a five-sigma result, comparable to tossing 21 heads in a row.
—Jennifer Ouellette, Quanta Magazine, 18 July 2013
Through regular reports released under the name sigma, the company offers a lens into the changing trends of the insurance world.
—David Grossman, Popular Mechanics, 17 Apr. 2019
Typically, only five sigma is needed to call something a discovery.
—John Timmer, Ars Technica, 28 June 2018
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Kara Nesvig, Parents, 13 Aug. 2024
The fruit fly where wMel comes from also carries sigma-virus, a type that Wolbachia does nothing to protect against.
—Ed Yong, Discover Magazine, 8 Feb. 2012
According to the group’s calculations, the Planck data point to a closed universe with a standard deviation of 3.5 sigma (a statistical measurement that means about 99.8% confidence that the result isn’t due to random chance).
—Rafi Letzter, Scientific American, 5 Nov. 2019
Thomson and his team must reach five-sigma certainty to definitively claim a discovery.
—Quanta Magazine, 14 May 2015
Historically, most industrial companies operate between three and four sigma, making them between 93% and 99.3% defect-free (these figures can vary slightly depending on the statistical model).
—Oliver Staley, Quartz at Work, 3 Sep. 2019
The gold standard for discovery is a five-sigma result, comparable to tossing 21 heads in a row.
—Jennifer Ouellette, Quanta Magazine, 18 July 2013
Through regular reports released under the name sigma, the company offers a lens into the changing trends of the insurance world.
—David Grossman, Popular Mechanics, 17 Apr. 2019
Typically, only five sigma is needed to call something a discovery.
—John Timmer, Ars Technica, 28 June 2018
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Cite this Entry
“Sigma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sigma. Accessed 1 Dec. 2024.
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sigma
noun
sig·ma
ˈsig-mə 
: the 18th letter of the Greek alphabet
—Σ or σ or ς
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