In order to have an experiment,there have to be at least two levels of the independent variable.

Name: In order to have an experiment,there have to be at least two levels of the independent variable.
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An experiment requires manipulation of an independent variable, which involves changing its levels to observe the effect on a dependent variable. At least two levels (e.g., presence vs. absence or different conditions) are necessary to compare outcomes and establish causality.

In Order to Have an Experiment,there Have to Be at Least