What is a independent variable
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In scientific experiments, an independent variable is the variable that is manipulated or changed by the researcher. It is the variable that is being tested to see if it has an effect on the dependent variable. The independent variable is also sometimes called the "manipulated variable" because the researcher is manipulating it to see what effect it has on the dependent variable. For example, in an experiment testing the effect of fertilizer on plant growth, the independent variable would be the amount of fertilizer applied to the plants.