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The purity of a gas is generally expressed as a grade prefixed with the letter N (rather than postfixed), indicating the "number of nines" in the percentage or decimal fraction. 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 ...
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%.
Median household wealth dropped by 36.1% compared to a drop of only 11.1% for the top 1%, further widening the gap. [ 44 ] [ 45 ] [ 46 ] During the economic expansion between 2002 and 2007, the income of the top 1% had grown 10 times faster than the income of the bottom 90% and 66% of total income gains went to the 1%.
Our bodies have 3 billion genetic building blocks, or base pairs, that make us who we are. And of those 3 billion base pairs, only a tiny amount are unique to us, making us about 99.9% genetically ...
Reading is the process of taking in the sense or meaning of symbols, often specifically those of a written language, by means of sight or touch. [1] [2] [3] [4]For educators and researchers, reading is a multifaceted process involving such areas as word recognition, orthography (spelling), alphabetics, phonics, phonemic awareness, vocabulary, comprehension, fluency, and motivation.
The total number also depends on whether the various "extensions" and "zones" are counted separately, or as part of one main suburb. The 2003 Regional Spatial Development Framework arrived at 87 names by counting various extensions (e.g. Chiawelo's 5) and zones (e.g. Pimville's 7) separately.
This is an accepted version of this page This is the latest accepted revision, reviewed on 1 January 2025. This article needs to be updated. Please help update this article to reflect recent events or newly available information. (March 2022) World map of countries shaded according to the literacy rate for all people aged 15 and over This is a list of countries by literacy rate. The global ...
The list of religious populations article provides a comprehensive overview of the distribution and size of religious groups around the world. This article aims to present statistical information on the number of adherents to various religions, including major faiths such as Christianity, Islam, Hinduism, Buddhism, and others, as well as smaller religious communities.