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A smoke particle,fingerprint,dust,or human hair could cause a hard disk head crash.
Control Group
In experimental research, a group of subjects that does not receive the treatment or intervention being studied and is used as a benchmark to measure the effects of that treatment.
Experimental Group
In research, the group of participants that receives the treatment or intervention being tested, contrasted with the control group.
Independent Variable
The variable that is intentionally changed or manipulated in an experiment to observe its effect on the dependent variable.
Dependent Variable
In experimental and statistical research, the variable being tested and measured, subject to change under the influence of the independent variable.
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