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The A21 Campaign partnered with recording artist Matt Redman and LZ7 to release a single titled Twenty Seven Million. The song was inspired by The A21 Campaign and was aimed at raising global awareness and was released on February 27 of 2012, in recognition of the estimated 27 million slaves throughout the world today.
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A21, A-21 or A.21 may refer to: A road in the List of A21 roads; a21, Inc., an American stock-photography company; The A21 Campaign, a non-profit, non-governmental organization that combats human trafficking, slave and bonded labor, involuntary domestic servitude, and child soldiery; Aero A.21, a 1920s-era Czechoslovakian military aeroplane
Random variables are usually written in upper case Roman letters, such as or and so on. Random variables, in this context, usually refer to something in words, such as "the height of a subject" for a continuous variable, or "the number of cars in the school car park" for a discrete variable, or "the colour of the next bicycle" for a categorical variable.
5. In probability and statistics, may specify the probability distribution of a random variable. For example, (,) means that the distribution of the random variable X is standard normal. [2] 6. Notation for proportionality. See also ∝ for a less ambiguous symbol. ≡ 1.
Also confidence coefficient. A number indicating the probability that the confidence interval (range) captures the true population mean. For example, a confidence interval with a 95% confidence level has a 95% chance of capturing the population mean. Technically, this means that, if the experiment were repeated many times, 95% of the CIs computed at this level would contain the true population ...
OMB Circular A-21 is a Government circular that sets forth the rules governing the eligibility and calculation of costs in support of sponsored research, development, training and other works produced in agreement with the United States Federal Government, but does not attempt to identify or dictate agency or institutional participation in those works.
A – adele ring or algebraic numbers. a.a.s. – asymptotically almost surely. AC – Axiom of Choice, [1] or set of absolutely continuous functions. a.c. – absolutely continuous.