Engineering, 11.12.2019 05:31, keisha71

Ais only achieved through control and involves a specific change in one event (dependent variable) that can reliably be produced by specific manipulations of another event (independent variable), and the change in the dependent variable is unlikely to be the result of other extraneous factors (confounding variables).

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Ais only achieved through control and involves a specific change in one event (dependent variable) t...