The term cosmic variance is the statistical uncertainty inherent in observations of the universe at extreme distances. It has three different but closely related meanings: It is sometimes used, incorrectly, to mean sample variance – the difference between different finite samples of the same parent population.
The term cosmic variance is the statistical uncertainty inherent in observations of the universe at extreme distances. It has three different but closely related meanings: It is sometimes used, incorrectly, to mean sample variance – the difference between different finite samples of the same parent population.
Source: Wikipedia "Cosmic variance" · CC BY-SA 4.0
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