関連ワード:  what is the function of a control variable    what is the purpose of a control variable in an experiment    what is the purpose of a control variable    what is the role of a control variable in an experiment    what is the role of a control variable    what is the purpose of a control variable in research    what is the function of control variables in regression    what is the purpose of a independent variable    what is the role of a independent variable    what is the purpose of using a control variable in research  
結果 : what is the function of a control variable