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For an approximately normal data set, the values within one standard deviation of the mean account for about 68% of the set; while within two standard deviations account for about 95%; and within three standard deviations account for about 99.7%. Shown percentages are rounded theoretical probabilities intended only to approximate the empirical ...
For example, a N2.0 gas is 99% (two nines) pure and 1% impurities by volume; a N6.0 gas is 99.9999% (six nines) pure, with 1 part per million (1 ppm or 1 vpm, volume per million) impurities. [7] Intermediate values indicate the digit following the last nine. For example, N4.6 estimates a purity level of 99.996% (four nines followed by a six). [7]
The pelagic part of the aphotic zone can be further divided into vertical regions according to depth and temperature: [89] The mesopelagic is the uppermost region. Its lowermost boundary is at a thermocline of 12 °C (54 °F) which generally lies at 700–1,000 meters (2,300–3,300 ft) in the tropics .
In particular, the term is used in connection with mainframes [11] [12] or enterprise computing, often as part of a service-level agreement. Similarly, percentages ending in a 5 have conventional names, traditionally the number of nines, then "five", so 99.95% is "three nines five", abbreviated 3N5.
Common standards require that a HEPA air filter must remove—from the air that passes through—at least 99.95% (ISO, European Standard) [4] [5] or 99.97% (ASME, U.S. DOE) [6] [7] of particles whose diameter is equal to 0.3 μm, with the filtration efficiency increasing for particle diameters both less than and greater than 0.3 μm. [8]
In Southern California, for instance, Santa Ana winds are forecast to cause critical fire conditions over the next couple of days across parts of Los Angeles and Ventura counties. Dry and windy ...
Parts-per-million cube of relative abundance by mass of elements in an average adult human body down to 1 ppm. About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium ...
Image source: The Motley Fool. Kinder Morgan (NYSE: KMI) Q4 2024 Earnings Call Jan 22, 2025, 4:30 p.m. ET. Contents: Prepared Remarks. Questions and Answers. Call ...