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Technician A wipes off the outside of a zerk fitting before injecting grease into it. Technician B injects just enough grease to cause the boot to expand slightly. Who is correct?
Interaction Effect
A phenomenon in which the effect of one independent variable on a dependent variable changes depending on the level of another independent variable.
Main Effect
In an experimental setup, the direct impact that an independent variable exerts on a dependent variable.
Factorial Research
A methodological approach in experiments that involves studying the effects of two or more factors.
Single-Factor Research
A study design where the effects of one independent variable on a dependent variable are examined.
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