<prompt> Translate the following text to EnglishPia zinatambuliwa na miundo ambayo si ya majaribio kwa maana kwamba mtafiti hajadhibiti kwa makusudi baadhi ya vigezo ili kuona athari zake zinazowezekana kwenye mfumo unaochunguzwa.  <response>: They also are identified with designs that are nonexperimental in the sense that the investigator is not deliberately manipulating some variable to see its possible effects on the system being studied. 