Controlling variables is an important part of experimental design. Controlled variables refer to variables or contributing factors that are fixed or eliminated in order to clearly identify the relationship between an independent variable and a dependent variable.
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catherinejoy23
thanks but it's not exactly the answer to my question
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Controlling variables is an important part of experimental design. Controlled variables refer to variables or contributing factors that are fixed or eliminated in order to clearly identify the relationship between an independent variable and a dependent variable.