関連ワード:  what is the role of control variables in research    what is the purpose of using a control variable in research    what is the purpose of control variable in an experiment research    what is the role of independent variable in research    what is the use of independent variable in research    what is the aim of using control variables in research    what is the primary purpose of controlling for confounding variables in research    what is the meaning of control variable in research    what is the control variable in research    what is the role of an independent variable in experimental research  
結果 : what is the purpose of control variable in research