Examlex
Which of the following variables causes only the outcome variable, but not the predictor variable?
Air Filter
A device that removes particles, such as dust and pollen, from air to improve quality or protect machinery by preventing the accumulation of contaminants.
Static Electricity
The buildup of electric charge on the surface of objects, usually caused by friction between materials.
Electrons Moving
The movement of electrons through a conductor, which constitutes the basis of electric current.
Copy Machines
Devices designed for reproducing documents and images rapidly by scanning the original and printing copies.
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