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In general, the number of nines is not often used by a network engineer when modeling and measuring availability because it is hard to apply in formula. More often, the unavailability expressed as a probability (like 0.00001), or a downtime per year is quoted. Availability specified as a number of nines is often seen in marketing documents.
Every 1.38 million years (twice in history of humankind) μ ± 6.5σ: 0.999 999 999 919 680: 8.032 × 10 −11 = 0.080 32 ppb = 80.32 ppt: 1 in 12 450 197 393: Every 34 million years (twice since the extinction of dinosaurs) μ ± 7σ: 0.999 999 999 997 440: 2.560 × 10 −12 = 2.560 ppt: 1 in 390 682 215 445: Every 1.07 billion years (four ...
US and Canada: 7 times a year. [3] Other countries: 5 times a year. [4] Regions: Worldwide [5] [6] Languages: English: Annual number of test takers: Over 1.37 million high school graduates in the class of 2024 [7] Prerequisites: No official prerequisite. Intended for high school students. Fluency in English assumed. Fee: Without writing: US$63. ...
Five-9's (99.999%) means less than 5 minutes when the system is not operating correctly over the span of one year. Availability is only meaningful for supportable systems. As an example, availability of 99.9% means nothing after the only known source stops manufacturing a critical replacement part.
The slogan "We are the 99%" became a unifying slogan of the Occupy movement in August 2011 [2] after a Tumblr blog, "wearethe99percent.tumblr.com," was launched in late August 2011 by a 28-year-old New York activist going by the name of "Chris" together with Priscilla Grim. [3] [4]
The number , whose typical value is close to but not greater than 1, is sometimes given in the form (or as a percentage % ()), where is a small positive number, often 0.05. By definition, the bounds () and () are to be constructed in such a way that as long as is collected randomly, i.e. the model assumption about its probability distribution ...
Higher education is anything beyond upper secondary school, and normally lasts three years or more. To be accepted to most higher education schools, a student must have attained a general university admissions certificate (generell studiekompetanse). This can be achieved by taking general studies while in upper secondary school or through the ...
Pre-tertiary education is organised in four main cycles: Pre-school education (until age 5 or 6), pre-primary education (1 year, between ages 5 to 7), primary education (4 years, between ages 6 to 11), basic education (6 years, between ages 10 to 17, ends on a "basic education certificate"), upper secondary education (two years, between ages 16 ...