النتائج (
العربية) 1:
[نسخ]نسخ!
Involve intervention or manipulation such as deliberate application or withdrawal of suspected cause or changing one variable in the causative chain in the experimental group while no change in the control group, and observing and comparing the out come of the experiment in both the groups.
يجري ترجمتها، يرجى الانتظار ..
