In this case, the experiment begins by creating two or more sample groups that are probabilistically equivalent, which means that measurements of traits should be similar among the groups and that the groups should respond in the same manner if given the same treatment.
Dǎɣ edag wen, irum assinta as ijji ən assin meɣ gruɗtan ən milhaw ajətnen ogdahnen ɣor edag ən mənhuy abiɣaran, awen astanitawəna as iketan ən azalayaten adəqəlan milhaw jar gruɗtan izar grubtan adamagradən as alməɣna wendǎɣ as jarawan iyan assəbələl.