Question: Sometimes it is difficult to establish a causal relationship between two correlating variables due to the presence of a third variable that correlates with both

Sometimes it is difficult to establish a causal relationship between two correlating variables due to the presence of a third variable that correlates with both of them. This third variable is called a _____ variable. Question 6 Select one: a. pure b. superfluous c. surplus d. confounding e. thwarting

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