random variable

noun

: a variable that is itself a function of the result of a statistical experiment in which each outcome has a definite probability of occurrence

called also variate

Examples of random variable in a Sentence

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Or, mathematically, what is the measure associated with that random variable? Steven Strogatz, Quanta Magazine, 12 June 2025 While there are many modern techniques for random number and random variable generation, the agentic AI space may now be at a perfect time to visit Monte Carlo. Adrian Bridgwater, Forbes, 22 Feb. 2025 Planetary formation involves a lot of random variables that affect how a planet forms and evolves over time. Phil Plait, Scientific American, 7 Feb. 2024 The number also appears in bell curves, which are found in statistics about random variables that add up. Kat Friedrich, Popular Mechanics, 16 Mar. 2023

Word History

First Known Use

1914, in the meaning defined above

Time Traveler
The first known use of random variable was in 1914

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Cite this Entry

“Random variable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/random%20variable. Accessed 7 Jul. 2026.

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