Find responding to changes in unobserved third variable

Reference no: EM13140244

Suppose the correlation between two variables x and y is due, in part, to the fact that y is responding to changes in some unobserved third variable. What is this due to?

(a) Cause and effect between x and y
(b) The effect of a lurking variable
(c) Extrapolation
(d) Common sense
(e) None of the above.

Reference no: EM13140244

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