Question

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Explanation:

Simpson's Paradox occurs when a lurking (or confounding) variable influences the relationship between two other variables, leading to a reversal in the direction of an association when data is aggregated versus disaggregated. The effect of lurking (or confounding) variables on an observed association is a common cause of Simpson's Paradox. These variables are often related to both the explanatory and response variables, and when not accounted for, they can distort the apparent relationship.

Answer:

lurking (or confounding)