In mathematics and statistics, a quantity derived from the moments of a probability distribution, used in advanced statistical analysis.
From Latin 'cumulare' (to heap or accumulate) + '-ant' (suffix forming nouns of agents or things); the term was coined in early 20th-century statistics to describe accumulated properties of distributions.
Cumulants are a tool statisticians use to describe data in ways that moments can't—they're like a more sophisticated language for talking about the shape and properties of data, and they're crucial for understanding rare events.
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