In statistics, a variable that changes together with another variable, often used in analysis to account for factors that might affect results.
From 'co-' (together) + 'variable' (from Latin 'variabilis,' changeable). Created in 20th-century statistics to describe dependent or related variables in data analysis.
Scientists use 'covariables' when they realize things don't happen in isolation—like how ice cream sales and drowning deaths both rise in summer, not because ice cream causes drowning but because warmth causes both.
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